Quantitative Aptitude Ques 1487

Question: The external diameter of a steel pipe is 5 cm and its thickness is 5 mm. If the length of the pipe is 14 cm. What is the volume of steel in the pipe?

Options:

A) 99 cm

B) 33 cm

C) 66 cm

D) 22 cm

Show Answer

Answer:

Correct Answer: A

Solution:

  • External radius (R) $ =\frac{5}{2}=2.5cm $ Internal radius $ (r)=(2.5-0.5)cm=2cm $ Volume of the steel $ =\pi (R^{2}-r^{2})\times h $ $ =\frac{22}{7}(R+r)(R-r)\times h $ $ =\frac{22}{7}\times 4.5\times 0.5\times 14=99cm^{2} $
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