A metal pipe is 21 cm long. Its external radius is 8 cm and its internal radius is 6 cm. Taking π = 22/7, what is the volume of metal in the pipe?
Correct answer B. 1,848 cu cm
Explanation
Volume of metal = π(R² - r²)h = 22/7 x (64 - 36) x 21 = 22/7 x 28 x 21 = 1848 cu cm.
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