Question

the volume of a metallic cylindrical pipe is 748 sq.cm .Its length is 14 cm an its external radius is 9cm. Find its thickness.

Answer 1

1)dimensions of a pipe

Height =h=14cm

Radius = r.cm

Given

Volume =748 cm^3

Pi*r^2*h=748

22/7*r^2*h=748


r^2 =(748*7)/(22*14)


r^2=17


r = root 17

r = 4(approximately)

Given external radius R= 9cm

Thickness of the pipe =9-4 =5cm