Question

A cylinder has a diameter of 20 cm. The area of the curved surface is 100 cm² (sq. cm). Find the volume of the cylinder correct to one decimal place.

Answer 1

Diameter of the cylinder = 20 cm

Hence, Radius (r) = 10 cm

Height = h cm

Volume of the cylinder = πr²h

= `22/7 xx 10 xx 10 xx 1.6`

= `(22 xx 100 xx 1.6)/7`

= 502.857 cm³

= 502.9 cm³

or 

= `22/7 xx 10 xx 10 xx 35/22`

= 500 cm³