Question

A shot put is a metallic sphere of radius 4.9 cm if the density of the metal is 7.8g per cm find the mass of the shot put

Answer 1

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We have, the radius of a metallic sphere (r) = 4.9 cm

∴ Volume of the sphere = 4 / 3 πr3  = 4 / 3 × 22 / 7 × 4.9 × 4.9 × 4.9 

= 493.005 cm3 

∵ Density of the metal used = 7.8 g/cm3

Hence, the mass of the shot - put = density×volume

=493.005 × 7.8 = 3845.44 

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