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Question

# A tent is in the form of a right circular cylinder, surmounted by a cone. The diameter of the cylinder is 24 m. The height of the cylindrical portion is 11 m, while the vertex of the cone is 16 m above the ground.The curved surface area of the cylindrical portion is

A
(246π)m2
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B
(264π)m2
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C
(426π)m2
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D
(462π)m2
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Solution

## The correct option is D (264π)m2Given, diameter =24 mTherefore, radius =d2=242=12 mand height given is 11 mTherefore, curved surface area of the cylinder =2(π)rh=2×(π)×12×11=264(π)

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