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Deepak Bora
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A shot-put is a metallic sphere of radius 4.9 cm. If the density of the metal is 7.8 g per cm cube, find the mass of the shot-put.

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M.L Aggarwal book Important Question of class 10 chapter Based on Mensuration for ICSE BOARD.
A shot-put is a metallic sphere of radius given. If the density of the metal is also given, find the mass of the shot-put.
This is the Question Number 04, Exercise 17.3 of M.L Aggarwal.

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  1. Given radius of the metallic sphere, r = 4.9 cm

    Volume of the sphere, V = (4/3)r3

    V = (4/3)×(22/7)×4.93

    V = 493.005

    V = 493 cm3 (approx)

    Given Density = 7.8 g per cm3

    Density = Mass/ Volume

    Mass = Density×Volume

    = 7.8×493

    = 3845.4 g

    Hence the mass of the shot put is 3845.4 g.

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