The area of the base of a right circular cylinder is 616 cm2 and its

1.	The area of the base of a right circular cylinder is 616 cm2 and its height is 25 cm. Find the volume of the cylinder.
Answer» We have, Area of base of right circular cylinder = 616 cm² Height of cylinder = 2.5 cm Let the radius of cylinder be ‘r’ cm By using the formula, Area of base of right circular cylinder = πr² So, πr² = 616 22/7 × r² = 616 r² = 616 × 7/22 = 196 r = √196 = 14cm ∴ Curved surface area of cylinder = 2πrh = 2 × 22/7 × 14 × 2.5 = 220 cm²

The area of the base of a right circular cylinder is 616 cm2 and its height is 25 cm. Find the volume of the cylinder.

Answer»

We have,

Area of base of right circular cylinder = 616 cm²

Height of cylinder = 2.5 cm

Let the radius of cylinder be ‘r’ cm

By using the formula,

Area of base of right circular cylinder = πr²

So,

πr² = 616

22/7 × r² = 616

r² = 616 × 7/22

= 196

r = √196

= 14cm

∴ Curved surface area of cylinder = 2πrh

= 2 × 22/7 × 14 × 2.5

= 220 cm²