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    Question

    The radius of the base of a conical tent is 9 m and its

    height is 12 m, Find the cost of the material needed to make it if it costs ₹120 per π m².
    A ₹15,200 Correct Answer Incorrect Answer
    B ₹13,500 Correct Answer Incorrect Answer
    C ₹14,500 Correct Answer Incorrect Answer
    D ₹16,200 Correct Answer Incorrect Answer

    Solution

    The slant height of the conical tent =√ (122+92)= 15 cm Hence, the curved surface area of the conical tent = π × 9 × 15 = 135π m² Thus, the cost of the material = (135 π × 120) / π = Rs. 16,200 The cost of the material is Rs. 16,200.

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