Question

The height of a right circular cylinder is 5cm its curved surface area is 660cm² find its radius of base

Answer 1

Closed Surface Area = 2$\pi$Rh

H = 5 cm

Area = 660 cm²

660 = 2 x 22/7 x R  x 5

Solving this will give R = 3cm

Answer 2

Answer:

given ,

CSA OF CYLINDER =660

2pi rh = 660

2*22/7*5*r = 660

r = 660 ÷ 31.42

r = 21 (approx)