Question

what is the formula for finding the volume of a 5 rupee coin.​

Answer 1

Step-by-step explanation:

A 5 rupee coin is cylindrical in shape having radius r and haight h.

TSA of a cylinder is given by 2πr(r+h)

Thus, the total surface area of the cylinder can be calculated by using the formula 2πr(h+r)

Hence, option D is correct.

Answer 2

Given; a 55 rupee coin

To Find; Volume of  5 rupee coin

Solution; It is given that we have a 5 rupee coin whose volume has to be measured

A coin is circular in shape and has some height it can be considered as a cylinder whose height is too much small

Let the radius of the cone be r but the height of the coin is h

The volume of coin = Volume of cylinder

The volume of coin = pi r2h

Hence the volume of the coin is the same as that of the cylinder