Multiple Choice Questions on A right circular cone is placed over a cylinder of the same radius Now the combined structure is pai........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A right circular cone is placed over a cylinder of the same radius Now the combined structure is pai...........

Quantitative Aptitude ( CCS) Mensuration 2D
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    A right circular cone is placed over a cylinder of the same radius. Now the combined structure is painted on all sides. Then they are separated now the ratio of area painted on Cylinder to Cone is 3:1. What is the height of Cylinder if the height of Cone is 4 m and radius is 3 m?

    5 m

    Incorrect Answer

    6 m

    Correct Answer

    8 m

    Incorrect Answer

    10 m

    Incorrect Answer
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    Explanation:

    Cylinder painted area = 2πrh+πr²
    Cone painted area = πrl
    2h+r/√ (r² +h1² ) = 3:1
    h = 6 m

    By: Amit Kumar
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