Question

The base area if a cylinder is 154 cm^2 and it's height is 10 cm. Find the curved surface area of the cylinder.

a) 350 cm^2 b) 640 cm^2
c) 440 cm^2 d) 360 cm^2​

Answer 1

Answer:

c) 440 cm^2

STEP BY STEP EXPLANATION

Area of base = Area of circle

154 cm^2 = TTr^2

154 = 22/7 × r^2

7/22 × 154 = r^2

49 = r^2

7 = r

Radius = 7 cm

Now

CSA of a cylinder = 2TTrh

= 2 × 22/7 × 7 × 10

= 44 × 10 => 440 cm^2

hope this helps you