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How many metres of cloth 11 m wide will be required to make a conical tent, the radius of whose base is 7 m and whose height is 24 m? (Take π = 22/7)1). 60 m2). 55 m3). 50 m4). 45 m |
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Answer» Radius of conical tent, r = 7 m HEIGHT of conical tent, h = 24 m. The slant height of the conical tent, l = √(r2 + h2) = √(72 + 242) = √(49 + 576) = √625 = 25 m. Then, the surface area of the conical tent = π × radius × slant height = (22/7) × 7 × 25 = 22 × 25 = 550 m2 The area of the cloth used to make the tent = 550 m2 The breadth of the cloth = 11 m. The LENGTH of that cloth required = 550/11 = 50 m ∴ 50 METRES of the cloth wide 11 m will be required to make such conical tent. |
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