A Jocker’s cap is in the form of a right circular cone of base radius 7 cm and height 24 cm. Find the area of the cloth required to make 10 such caps.
A Jocker’s cap is in the form of a right circular cone of base radius 7 cm and height 24 cm. Find the area of the cloth required to make 10 such caps.

Solution:

Given height of the cone, h 24 cm

Radius, r = 7 cm

We know that l2 = h2+r2

l2 = 242+72

l2 = 576+49

l2 = 625

l = √625

l = 25

Curved surface area = rl

= (22/7)×7×25

= 22×25

= 550 cm2

So the area of the cloth required to make 10 such caps = 10×550 = 5500

Hence the area of the cloth required to make 10 caps is 5500 cm2.