   ### Rathindra N Male, 56 Years

Associated for 4 Months
Presently, I am teaching the students online.
Class 11 - 12 Tutor

#### Activity Score - 105

Area: 1 More
Location: Kolkata, India
Qualification :
• B.Sc (Calcutta University - 1985)
• Total Experience:
20 Years
• Hourly Fees:
INR 1000
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Teaches:
 Class 9 - 10 Mathematics Physics Chemistry ICSE INR 500 / Hour Class 11 - 12 Mathematics ISC Board INR 1000 / Hour
• ## Question: Factorize : 3(a+b) + 3(b+c) + (c+a)3

Posted in: Mathematics | Date: 16/02/2021

6(a+b+c)

• ## Question: Find the minimum and maximum value of f(x)=x^x

Posted in: Mathematics | Date: 16/02/2021

### Answer:

Max f(x)=0.79 Min f(x)=1

• ## Question: Factorize : 3(a+b) + 3(b+c) + (c+a)3

Posted in: Mathematics | Date: 16/02/2021

### Answer:

3(a+b)+3(b+c)+(c+a)3 =3a+3b+3b+3c+3c+3a =6a+6b+6c 6(a+b+c)

• ## Question: Without using the long division method, identify which of the following common f...

Posted in: Mathematics | Date: 16/02/2021

### Answer:

5/6 as denominator 6=2 x 3, that means (2.5)/3 is a non-terminating recurring decimal.

• ## Question: Refractive indices of glass for blue, red and yellow colours are µb, µr and µ...

Posted in: Physics | Date: 16/02/2021

### Answer:

In the decreasing order of refractive index of glass for blue, red and yellow are ur>uy>ub

• ## Question: A body is allowed to fall freely. The ratio of its displacement in 1,2 and 3 sec...

Posted in: Physics | Date: 16/02/2021

### Answer:

1:4:9 as displacement directly proportional to the square of time.

• ## Question: Which planet is not tilted on it's axis?

Posted in: Physics | Date: 16/02/2021

Mercury

• ## Question: Derive the expression for the fantripetal force 'F' acting on a particle of mass...

Posted in: Physics | Date: 16/02/2021

mv^2/r

• ## Question: One-fourth of the perimeter of a square gives the

Posted in: Advanced Maths | Date: 17/02/2021

### Answer:

1/4 of perimeter of a square= side of square as perimeter of square = 4 x side

• ## Question: Out of three given numbers the first number is twice the second and thrice the t...

Posted in: Advanced Maths | Date: 17/02/2021

### Answer:

Let the nos. be a, b and c a=2b, a=3c b=a/2, c=a/3 (a+b+c)/3=121 (a+a/2+a/3)/3=121 11a=363 a=33, c=11 a-c=33-11=22

• ## Question: A Train 150 metre long is running at a speed of 120 km per hour a man standing o...

Posted in: Advanced Maths | Date: 17/02/2021

### Answer:

Length of the train=150m, speed of the man=10km/h=50/18m/s, time taken by the man=150x18/50=54s due to inertia of motion, speed of train is neglected.

• ## Question: A bar graph is drawn to the scale of 1 cm = k units. if the length of the bar re...

Posted in: Mathematics | Date: 17/02/2021

### Answer:

1cm.=k unit, 5.4cm=405 units, 1cm.=405/5.4=75 units, therefore, k=75

• ## Question: A body is allowed to fall freely. The ratio of its displacement in 1,2 and 3 sec...

Posted in: Physics | Date: 17/02/2021

### Answer:

Ratio of displacement in 1s,2s and 3s=1^2:2^2:3^2=1:4:9

• ## Question: The sum of money doubles itself in5 years .find the percent per anum

Posted in: Mathematics | Date: 18/02/2021

### Answer:

Let, P be ₹100, A=₹200, SI=₹(200-100)=₹100, therefore, R=(SI x 100)/(P x T)= (100 x 100)/(100 x 5)= 20%

• ## Question: 18 years ago a man was 3 times as old as his son now the man is twice as old as ...

Posted in: Mathematics | Date: 18/02/2021

### Answer:

Let, son's and man's present ages be x and 2x respectively, 18 years ago, son's age was (x-18)yrs and man's age was (2x-18) yrs, ATP, (2x-18)=3(x-18)=>3x-2x=54-18=>x=36, 2x=72, therefore, son's present age=36yrs and man's present age=72 yrs

• ## Question: Without using the long division method, identify which of the following common f...

Posted in: Mathematics | Date: 18/02/2021

### Answer:

One of the factors of denominator 6 of a fraction 5/6 is 3 which gives recurring decimal as 1/3=0.333...

• ## Question: State law of conservation of movementum and drive it for newton third law

Posted in: Physics | Date: 20/02/2021

### Answer:

Newton’s third law states that for a force applied by an object A on object B, object B exerts back an equal force in magnitude, but opposite in direction. This idea was used by Newton to derive the law of conservation of momentum. It is often stated as: For every action, there is an equal and opposite reaction.

• ## Question: Question:- Anil had to paint a wall. he painted 25% of the wall. Umar came and p...

Posted in: Mathematics | Date: 10/03/2021

### Answer:

60% of the wall is left unpainted, 25% of the wall Anil has painted. Therefore, 100%-(60%+25%)=15% of the wall Umar has painted. Hence, Total area of wall =30÷15%=30×100/15=200 sq. m. Therefore, area of wall painted by Anil=25% of 200 sq.m.=50 sq.m.

• ## Question: if (x-2) is a factor of polynomial f(x) but not of g(x), then it must be a facto...

Posted in: Mathematics | Date: 18/03/2021

### Answer:

Ans: option (a), as (x-2) is a factor of f(x) as well as f(x).g(x) which is divisible by (x-2) although (x-2) is not a factor of g(x).

• ## Question: Anil is able to double his money in 3 years how much ROI is he getting yearly.

Posted in: Mathematics | Date: 15/04/2021

### Answer:

Let, P=₹100, therefore A=₹200, SI=A-P=₹200-₹100=100, therefore, R = (SI×100)/(P×T)=(100×100)/(100×3)=100/3%= 33 and half%

• ## Question: Mass is the amount of matter but what does that matter mean is it the molecule o...

Posted in: Physics | Date: 15/04/2021

### Answer:

No, matter is anything that has mass and occupies space. Matter consists of molecules.

• ## Question: State some applications of calculus in physics and mathematics..

Posted in: Physics | Date: 18/05/2021

### Answer:

Applications of Calculus in Physics is used to help define, explain and calculate motion, electricity, heat, light etc. where as calculus is used in business and economics in Mathematics

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