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.
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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
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