Question

If the lateral surface of a cylinder is 94.2 cm² and its height is 5 cm, then find (i) radius of its base (ii) its volume. [Use π = 3.14]

Answer 1

(i) Height (h) of cylinder = 5 cm

Let radius of cylinder be r.

CSA of cylinder = 94.2 cm²

2πrh = 94.2 cm²

(2 × 3.14 × r × 5) cm = 94.2 cm²

r = 3 cm

 

(ii) Volume of cylinder = πr²h

= (3.14 × (3)² × 5) cm³

= 141.3 cm³