Question

The radius of the ends of frustum of a cone 40cm high are 20cm and 11cm. Find its slant hight.​

Answer 1

Dear Student,

◆ Answer -

l = 41 cm

● Explanation -

# Given -

h = 40 cm

r1 = 20 cm

r2 = 11 cm

# Solution -

Slant height of the frustum of cone is -

l = √(h^2 + (r1-r2)^2)

l = √(40^2 + (20-11)^2)

l = √(1600 + 9^2)

l = √(1600 + 81)

l = √1681

l = 41 cm

Hence, slant height of the frustum of cone is 41 cm.

Thanks dear. Hope this helps you..