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    Question

    The volume of a cone is 8192 ╧А cm3. The

    height of the cylinder is 35% more than the slant height of the cone. The lateral surface area of the cylinder is 4536 ╧А cm2. If the base area of the cone is 1024 ╧А cm2, then find out the volume of the cylinder (in┬а cm 3).
    A 99792 Correct Answer Incorrect Answer
    B 299376 Correct Answer Incorrect Answer
    C 310464 Correct Answer Incorrect Answer
    D 103488 Correct Answer Incorrect Answer
    E None of the above Correct Answer Incorrect Answer

    Solution

    If the base area of the cone is 1024 ╧А cm2. ┬а╧А x (radius of the cone)2 = 1024 ╧А ┬а ┬а Eq.(i) radius of the cone = 32 cm [Here negative value is not possible.] The volume of a cone is 8192 ╧А cm3. (тЕУ) x ╧А x (radius of the cone)2 x height of the cone = 8192 ╧А Put Eq.(i) in the above equation. (тЕУ) x height of the cone = 8 height of the cone = 24 cm┬а ┬а Eq.(ii) (slant height of the cone)2 = (radius of the cone)2 + (height of the cone)2 (slant height of the cone)2 = (32)2 + (24)2 = 1024+576 = 1600 slant height of the cone = 40 cm The height of the cylinder is 35% more than the slant height of the cone. height of the cylinder = (100+35)% of 40 height of the cylinder = 135% of 40 = 54 cm The lateral surface area of the cylinder is 4536 ╧А cm2. 2 x ╧А x radius of the cylinder x height of the cylinder = 4536 ╧А radius of the cylinder x 54 = 2268 radius of the cylinder = 42 Volume of the cylinder = ╧А x (radius of the cylinder)2 x height of the cylinder = ╧А x (42)2 x 54 = (22/7) x 1764 x 54 = 22 x 252 x 54 = 299376 cm3

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