Mathematics
WAEC 2022
Find the volume of a cone of radius 3.5cm and vertical height 12cm. [Take π = 22/7]
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A.
15.5cm\(^3\)
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B.
21.0cm\(^3\)
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C.
142cm\(^3\)
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D.
154cm\(^3\)
Correct Answer: Option D
Explanation
volume of a cone = ⅓ π r2h → \(\frac{1*22*3.5*3.5*12}{3*7}\)
= 154cm\(^3\)
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