How i find the best tricky way for solving the question of class 9^{th} of Surface areas and Volumes chapter of class 9^{th} give me the best and easy method for this question no.2 of exercise 13.8 Find the amount of water displaced by a solid spherical ball of diameter (i) 28 cm (ii) 0.21 m (Assume π =22/7)

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# Find the amount of water displaced by a solid spherical ball of diameter (i) 28 cm (ii) 0.21 m (Assume π =22/7) Q.2

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(i) Diameter = 28 cm

Radius, r = 28/2 cm = 14cm

Volume of the solid spherical ball = (4/3) πr

^{3}Volume of the ball = (4/3)×(22/7)×14

^{3 }= 34496/3Hence, volume of the ball is 34496/3 cm

^{3}(ii) Diameter = 0.21 m

Radius of the ball =0.21/2 m= 0.105 m

Volume of the ball = (4/3 )πr

^{3}Volume of the ball = (4/3)× (22/7)×0.105

^{3}m^{3}Hence, volume of the ball = 0.004851 m

^{3}