• Male, 21 Years
• Activity Score275

## Rohit A

Associated for 1 Year 10 Months
Mathematics Teacher
• I go to Student's Home
• Qualification:
B.Tech/B.E.
• Experience:
i am in final year B Tech in Mathematics and Computing IIT Delhi . I am very good in Mathematics , Physics and Chemistry .
• Teaches:
Physics, Mathematics, Chemistry, Algebra, All Subjects, IIT JEE Advanced, AIEEE, IIT JEE Mains, Statistics
• Board:
AIEEE, ICSE, CBSE, Local State Board, IGCSE
• Areas:
• Pincode:
110016
Profile Details

#### Qualification :

 B.Tech/B.E. IIT Delhi 2017

i am in final year B Tech in Mathematics and Computing IIT Delhi . I am very good in Mathematics , Physics and Chemistry .

#### Tutoring Option:

Home Tuition Only

#### Tutoring Approach:

I focus mainly on problem solving and short notes.

#### Hourly Fees [INR]:

700.00

 Class 1 - 5 All Subjects, ICSE, CBSE, Local State Board INR 700.00 /hour Class 9 - 10 Mathematics, Physics, Chemistry, Algebra, ICSE, CBSE, Local State Board, IGCSE INR 500.00 /hour Class 11 - 12 Mathematics, Chemistry, Statistics, Algebra, CBSE, ICSE, Local State Board INR 700.00 /hour Engineering Entrance & IITJEE Mathematics, IIT JEE Mains, AIEEE, IIT JEE Advanced, AIEEE INR 700.00 /hour Engineering Subjects Mathematics INR 500.00 /hour Class 6 - 8 All Subjects, ICSE, CBSE, Local State Board, IGCSE INR 700.00 /hour
• ## Question: Help me to find the wrong number in the series. 56 , 58 , 62 , 70 , 84 , 118 ...

Posted in: Bank PO | Date: 11/01/2018

58-56 = 2

62-58 = 4 = 2^2

70-62 = 8 = 2^3

86-70 = 16 = 2^4

118-86 = 32 = 2^5

182-118 = 64 = 2^6

Hence 84 is the wrong number shold be replaced by 86.

• ## Question: Which term comes next in the series ? Z , U , Q , ? , L

Posted in: Bank PO | Date: 11/01/2018

Always try to write the number corresponding to the alphabets

Z=26 , U=21 , Q=17 , ? , L=12

26-21 = 5

21-17 = 4

17-14 = 3

14-12 = 2

difference decreases by 1

Answer is 14 which corresponds to N

• ## Question: A car is traveling at 40 km/h and the driver puts on the brakes, bringing t...

Posted in: MCAT | Date: 11/01/2018

Average acceleration = change in velocity / change in time = (Velocity_final - Velocity_initial)/ T

Now Velocity_final = 0 (since car stops and comes to rest)

Velocity_initial = 40km/hr = 40*1000 metre/ 3600 second = 11.11 metre/second (always check unites)

time = 6 seconds

Average_accelration = (0 - 11.11)/6 = -1.85 metre / second^2 (also take care of negative sign)

Acceleartion is negative since velocity is decreasing

• ## Question: A 1000 kg rocket ship, travelling at 100 m/s is acted upon by an average force o...

Posted in: MCA Entrance | Date: 11/01/2018

Always write whats given and whats asked

m = 1000kg , u = 100m/s , F = 20kN = 20,000 N , t = 8s

a = F/m = 20,000/1000 = 20 m/s^2

v = u + a*t  = 100 + 20*8 = 100+160 = 260m/s

B option will be the answer

• ## Question: If a$^2$ + b$^2$ + c$^2$ = 20 and a + b + c = 0, Help me to...

Posted in: Bank PO | Date: 11/01/2018

(a+b+c)^2 = a^2+b^2+c^2 +2(ab+bc+ca)

0 = 20+2*(ab+bc+ac)

ab+bc+ac = -10

• ## Question: From a group of boys and girls, 15 girls leave. There are then left 2 boys for e...

Posted in: Bank PO | Date: 11/01/2018

let the number of girls in the beggining be x ,

15 girls leave , the number of girls = x-15

2 boys for one girl , the number of boys = (x-15)*2 = 2x-30

45 boys leave , the number of boys = 2x-30 - 45 = 2x - 75

5 girls for each boy , the number of girls = 5*(2x-75) = 10x - 375

So 10x-375 = x-15 => 9x = 360 => x = 360/9 = 40

It's a good question , just start with whats given and keep on writing

• ## Question: Village x has a population of 68000, which is decreasing at the rate of 1200 per...

Posted in: Bank Clerical | Date: 11/01/2018

Let the popuation be equal after t years

Loss in one year is 1200 , loss after t years = 1200*t

Population X = 68000 - 1200*t

Loss in one year is 800 , loss after t years = 800*t

Population Y = 42000 - 800*t

Now ,  68000 - 1200*t = 42000-800t => 1200t-800t = 68000-42000 => 400t = 26000 => t = 26000/400 = 65 years

• ## Question: If 𝒙∗𝒚= 𝒙$^2$+ 𝒚$^2$− 𝒙𝒚, then find the value...

Posted in: Bank Clerical | Date: 11/01/2018

9*11 = 9^2+11^2-9.11 = 81 + 121 - 99 = 103

• ## Question: A 20 kg wagon is released from rest from the top of a 15 m long lane, which is a...

Posted in: MCAT | Date: 11/01/2018

say coefficient of friction is u ,  Normal force is N , weight is mg , and angle with horizontal of incline  is A , friction is f .

f_kinetic  = uN (only when body is moving)

mg will be broken into two parts one along the incline which is mgsin(A)  and perpendicular to incline which is mgcos(A)

mgcos(A) will be balanced by Normal N , Hence N = mgcos(A)

f = uN = umgcos(A) As A increases cos(A) decreases , hence friction decreases.

B option is correct

• ## Question: A 10 kg wagon rests on a frictionless inclined plane. The plane makes an angle o...

Posted in: CAT Exam | Date: 11/01/2018

Force down the incline is mgsin(theta) = 10*9.8*sin(30) = 49N This much force we need to apply to keep the body from sliding down

• ## Question: A firefighter jumps horizontally from a burning building with an initial speed o...

Posted in: MCAT | Date: 11/01/2018

Accelration vector is g = downwards

Initial velocity is horizontal .  Hence intital angle is 90 degrees .

As the gains velocity in the downwards direction velocity vector shifts from horizontal direction to vertical direction and acceleration is still constant in the downwards direction , so angle decreases between them. so the answer is A

• ## Question: Help me to find the next term in the alpha-numeric series . 2A11 , 4D13 , 12G...

Posted in: Bank PO | Date: 11/01/2018

2A11

4D13 = (2*2 , (A+3) = D , 11+2)

12G17 = (4*3,(D+3) = G , 13+4)

?   = (8*3,G+3, 17+8) = 24J25

• ## Question: Help me to find the next term in the alpha-numeric series . C4X , F9U , I16R ...

Posted in: Bank PO | Date: 11/01/2018

let us see the middle numbers 4 , 9, 16 , next is 5*5 = 25 as first is 2*2 = 4 ,  second is 3*3= 9 , third is 4*4 = 16

F - C = 6-3 = 3

I - F = 9-6 = 3

L-I = 12-9 = 3

first letter is L

Now lets see the last one

X-U = 24-21 = 3

U - R = 21- 18 = 3

R - O = 18-15 = 3

hence the letter is O

• ## Question: A 30 kg girl sits on a seesaw at a distance of 2 m from the fulcrum. Where must ...

Posted in: Physics | Date: 11/01/2018

Centre of mass should be at the fulcrum

lets say the father sits at a distance x from fulcrum on the other side

(30*2 - 90*x)/(30+90) = 0 => x = 60/90 = 2/3 = 67cm from fulcrum

B option is correct

• ## Question: A man walks 30 m east and then 40 m north. What is the difference between his tr...

Posted in: Physics | Date: 11/01/2018

B option

Distance travelled is the path travelled  = 30+40 = 70m

Displacement is the shortest path = 50m northeast (find using pythagoras therorem )

Difference = 70-50 = 20m

• ## Question: Help me to complete the series. 4 , 7 , 12 , 19 , 28 , ?

Posted in: Bank PO | Date: 11/01/2018

7-4 = 3

12-7 = 5

19-12  = 7

28-19 = 9

x - 28 = 11 => x = 28+11 = 39

• ## Question: The small line blinking on the computer screen is known as_____.

Posted in: Bank Clerical | Date: 12/01/2018

Cursor

• ## Question: Which logical formula doesn’t brings the outcome as “TRUE” or ...

Posted in: UPSC Exam | Date: 12/01/2018

If

• ## Question: What does an electronic spreadsheet consists of ?

Posted in: Bank PO | Date: 12/01/2018

D all of the above

• ## Question: At a telephone exchange, three phones ring at intervals of 20 sec, 24 sec and 30...

Posted in: Mathematics | Date: 12/01/2018

LCM of 20, 24, 30 = 120 that means they will ring together after every 120 seconds , ie 2 minutes.

Therefore they will ring next together at 11: 27

• ## Question: What gas is produced when hydrochloric acid and magnesium are mixed?

Posted in: Physics | Date: 16/01/2018

Metals react with acid to produce hydrogen gas.

• ## Question: Mr. Kamlesh borrowed Rs. 40000 from a bank at 10% per annum compound interest. A...

Posted in: Mathematics | Date: 16/01/2018

After 1 year , A = 40000 + 10% *40000 - 10000 = 34000

After 2 year , A = 34000+10%*34000 - 10000 = 27400

After 3 year  A = 27400+10%*27400 - 10000 = 20140

After 4 year A = 20140+10%*20140 - 10000 = 12154

• ## Question: Two hackers planned to hack a bank account which had debit card pin code in such...

Posted in: UPSC Exam | Date: 16/01/2018

let the first two digits be x and last two digts be y .

Then x = x + 200%x = 3x and y = y+300% = 4y

given 3x/4y = 12/15 => x/y = 16/15

• ## Question: Given below is a question and two statements numbered I and II given below it. Y...

Posted in: Mathematics | Date: 16/01/2018

three digits number greater than 500 containing odd digits will contain , 5 , 7 , 9 , since by statemet II , it must be maximum of all three , the answer is 975 , both statements are needed to answer

• ## Question: Shalini carries a bag which contains 50 coins and each coin is marked from 51 to...

Posted in: Mathematics | Date: 16/01/2018

A = [53,59,61,67,71,73,79,83,89,97]  elements in A = 10

P = 10/50 = 1/5

• ## Question: Two boys are playing a game in which they have to pick balls out of a bag. The b...

Posted in: Mathematics | Date: 16/01/2018

P = 4C2 * 2C2 / 14C4

• ## Question: If three dice are thrown simultaneously, then the probability of getting a score...

Posted in: Mathematics | Date: 16/01/2018

5 = 1+1+3  number of permuations = 3!/2! = 3

5 = 1+2+2 number of permuation = 3!/2! = 3

P = (3+3)/6*6*6 = 1/36

• ## Question: A bag contains 4 red balls, 6 White balls, 8 Green balls and 10 Black balls. If ...

Posted in: Mathematics | Date: 16/01/2018

P = 10 / (4+6+8+10) = 10/28 = 5/14

• ## Question: Three letters are written to different persons and addresses on the envelopes ar...

Posted in: Mathematics | Date: 16/01/2018

correct ways is only one

total number of ways is 3! = 6

P = 1/6

• ## Question: One-third of 12 oranges got rotten. If 4 oranges are taken out randomly, what is...

Posted in: Mathematics | Date: 16/01/2018

rotten = 1/3 * 12 = 4

P ( all rotten ) = (4/12) * (3/11)*(2/10)*(1/9)

• ## Question: In a simultaneous throw of two dice, what is the probability of getting a total ...

Posted in: Mathematics | Date: 16/01/2018

7 = 1+6 = 6+1 = 2+5= 5+2 = 4+3= 3+4

P = 6/36 = 1/6

• ## Question: The odds against an event A are 5:3 and odds in favor of another independent eve...

Posted in: Mathematics | Date: 16/01/2018

P(A) = 5/(5+3) = 5/8

P(B) = 6/(6+5) = 6/11

P(A' ^ B') = P(A') * P(B') = (1-P(A))*(1-P(B)) = (1 - 5/8) * ( 1 - 6/11)

• ## Question: Six different pencils and three bags are taken. Each pencil is to be put in one ...

Posted in: Mathematics | Date: 16/01/2018

6 = 1+2+3

number of ways = 3! = 6

• ## Question: Everybody in a room shakes hands with everybody else. The total number of hand-s...

Posted in: Mathematics | Date: 16/01/2018

Choose any two person and its a handshake

ie nC2 = 55 => n(n-1)/2 = 55 => n = 11

• ## Question: The number of ways in which 6 different marbles can be put in two boxes of diffe...

Posted in: Mathematics | Date: 16/01/2018

6 = 1+5 = 2+3

Answer = 6C5 + 6C2 = 6+15 = 21

• ## Question: In a simultaneous throw of two dice, what is the probability of getting a total ...

Posted in: Mathematics | Date: 16/01/2018

7 = 1+6 = 6+1 = 2+5= 5+2 = 4+3= 3+4

P = 6/36 = 1/6

• ## Question: Out of 5 men and 3 women, a committee of 3 persons is to be formed. In how many ...

Posted in: Mathematics | Date: 16/01/2018

3C2*5C1+3C3 =3*5+1 = 16

• ## Question: A circle is drawn with diameter 20 cm. A point P is taken on the circle such tha...

Posted in: Mathematics | Date: 16/01/2018

dimater suspends 90 degree at circle and Area of right angle traingle = 1/2 * hypotenuse * distance of hypotenuese from P = 1/2 * 20 * 10 = 100

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