Question

find the volume of a cylinder formed by using 10 coins each of diameter 1.5 cm and 0.2 cm thickness. ​

Answer 1

Volume of the cylinder formed will be equal to the volume of the 10 coins.

So,

Volume of 1 coin = πr²h

==> π × 1.5/2 × 1.5 / 2 × 0.2

==> π × 0.75² × 0.2

==> π × 0.1125 { take, π = 3.14 }

==> 0.35 cm³

Now, Volume of Cylinder = 10 × Volume of One Coin

==> 10 × 0.35

==> 3.5 cm³

Hence, Volume of the Cylinder formed is 3.5 cm³