New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    The outer radius of a hollow metallic spherical ball is

    15 cm while the thickness of the metal used to make it is 12 cm. Find volume of the metal used in making this ball.
    A 1106π Correct Answer Incorrect Answer
    B 4464π Correct Answer Incorrect Answer
    C 1006π Correct Answer Incorrect Answer
    D 1300π Correct Answer Incorrect Answer

    Solution

    Inner radius of the ball = 15 - 12 = 3 cm Required volume = 4/3 × π × (153 - 33) =   4/3 × π × (3375 - 27) = 4/3 × π × 3348 = 4464π

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