Question

the volume of metalic cylindrical pipe is 770 cm^3. Its length is 14 cm and its external radius is 9 cm .Then , its thickness is

Answer 1

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Volume of Cylinder = pie × r^2 × h

=>770 = 22/7 × r^2 × 14

=> 770 = 22 × 2 × r^2

=> r^2 = 770 /44

=> r^2 = 17.5

=> r = 4.18 cm.

Therefore, The thickness = R2 - R1

=> 9 - 4.18

=> 4.82cm
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