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A circle tent is cylindrical up to a height of 3 m and conical above it. If the diameter of the base is 12 m and the slant height of the conical part is 10m, then the total area of the canvas exceeds.

Class: 9

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200 m2

250 m2

300 m2

350 m2

answer is C.

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Detailed Solution

Area of cone =

π

rl
= 22/7 × 12/2 × 10
= 1320/7 cm2 Area of Cylinder = 2

π

rh
= 2 × 22/7 × 12/2 × 3
= 792/7 cm2
The total area of canvas = Area of cone + Area of cylinder
= 1320/7 +792/7
= 301.71 cm2 ≅ 300 cm2
So Option (3) is Correct.

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