The volume of metallic cylindrical pipe of uniform thickness is 748 c c Its length is 14 cm and its ...........

Quantitative Aptitude (CGL) Mensuration 3D

The volume of metallic cylindrical pipe of uniform thickness is 748 c.c. Its length is 14 cm and its external radius is 9 cm. The thickness of the pipe is

0.5 cm

1.5 cm

1 cm

2 cm

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Explanation:

volume of hollow cylinder=pi*[(outer radius)²- (inner radius)²]* height;
748 = pi. [(9)²-r²]*14;
(9)²-r²= (748*7)/(14*22) = 17;
r= √81- 17= 8 cm.
Hence, thickness of pipe = 9-8 = 1 cm.