The curved surface area of a cone is 550 sq cm and its base radius is 7 cm. Taking π = 22/7, what is its volume?
Correct answer B. 1,232 cu cm
Explanation
πrl = 550 gives l = 550 / 22 = 25 cm. Height = square root of (625 - 49) = 24 cm. Volume = 1/3 x 154 x 24 = 1232 cu cm.
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