Question

Find the curved surface area of a cone with base diameter 30 cm and height 40cm.

Answer 1

the diameter of the base is 15cm. Find the curved surface area of cone. Solution: Given that, Slant height: l = 20cm

Answer 2

Slant = root of 30^2 + 40^2 = 50

Curved surface area = pi *r*l

pi*15*50

= 750*pi = 750*3.14

= 2355 cm ^2