Tutoring with Sandeep Kumar Maurya

Answer

Ans:C: 21.75cm is the Right Answer.

Description: Joining the two centers divide the cords into two equal parts, with 12/2 = 6.5cm each.

Applying pythagorus theorem in each circle and triangle sqrt(10^2  - 6^2) +  sqrt(15^2  -  6^2)

After Calculating these all You will get 21.7477 that is equal to 21.75 cm Your Desired Answer

Answer

Hi, D is he right Answer ,the number Has 4 Significant Figure. If the Number Contains 0 at the end then it is not considered as significant but in between it becomes significant

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Hi, D is the Right Option, this number contains 5 significant figure,

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Hi, D is the Right Option, Magnetic Field Contains Magnitude as well as Direction Which is said to be vector Quantity

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Hi, D is the Right Option, As it Contains Zeros , Which is Omitted at the time of significant number Calculation So 3400 has 2 Significant Figure

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Option D is Right As It Contains Only Magnitude , But No direction.

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By Calculatinf total surface area: 2(l*B+b*h+h*l)

we are Getting 8.72 m^2 as a significant figure, and Volume=l*b*h    is equal to: 0.0855 m^3

Answer

Hi, 

According to Formulae:  I*II=LCM * HCF

Hence 306*657=LCM*9

After solving this: LCM=22338