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    Question

    A conical water tank has a volume of 980 m┬│ and the

    area of its base is 198 m┬▓. Calculate the length of the metal sheet required to construct the tank, given that the width of the metal sheet is 4 meters. (Approx)
    A 115.2 Correct Answer Incorrect Answer
    B 104.8 Correct Answer Incorrect Answer
    C 110.4 Correct Answer Incorrect Answer
    D 98.4 Correct Answer Incorrect Answer

    Solution

    ╬аr2 =198 22/7├Чr2=198 r2 = 63cm r=7.95=8(approx.) And now the volume of the conical tent =980 1/3╧Аr2 h=980 1/3 ├Ч22/7 ├Ч63 ├Чh = 980 h= (980├Ч7├Ч3)/22├Ч63 h=20580/1386=14.8m l = тИЪ219.04+63= тИЪ282.04 =16.7cm The area of the canvas required to build the tent = ╧Аr l Which will equal the area of the rectangular canvas. ╧А r l = 4├Чlength of canvas 22/7├Ч 8├Ч16.7 = 4 ├Ч length of canvas length of canvas =3.14├Ч2├Ч16.7 = 104.8m

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