EXERCISE 13.8 2nd problem

1.	EXERCISE 13.8 2nd problem
Answer» 2. Find the amount of water displaced by a solid spherical ball of diameter(i) 28 cm (ii) 0.21 m(Assume π =22/7)Solution:(i) Diameter = 28 cmRadius, r = 28/2 cm = 14cmVolume of the solid spherical ball = (4/3) πr3Volume of the ball = (4/3)×(22/7)×143\xa0= 34496/3Hence, volume of the ball is 34496/3 cm3(ii) Diameter = 0.21 mRadius of the ball =0.21/2 m= 0.105 mVolume of the ball = (4/3 )πr3Volume of the ball = (4/3)× (22/7)×0.1053\xa0m3Hence, volume of the ball = 0.004851 m3

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