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    Question

    The ratio of the radii of the

    bases of a cylinder and a cone is 7:8, while the ratio of their heights is 4:5. What is the ratio of the volume of the cylinder to the volume of the cone?
    A 5:6 Correct Answer Incorrect Answer
    B 8:5 Correct Answer Incorrect Answer
    C 2:5 Correct Answer Incorrect Answer
    D 4:5 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let r and R be the radii of the bases of the cylinder and the cone, respectively. r/R =7/8 Let h and H be the heights of the cylinder and the cone, respectively. h/H =4/5 The formula for volume ratio: Substituting values:

    Hence, the ratio of the volumes is 147:80.

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