How i find the best tricky way for solving the question of class 9th of Surface areas and Volumes chapter of class 9th 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) πr3
Volume of the ball = (4/3)×(22/7)×143 = 34496/3
Hence, volume of the ball is 34496/3 cm3
(ii) Diameter = 0.21 m
Radius of the ball =0.21/2 m= 0.105 m
Volume of the ball = (4/3 )πr3
Volume of the ball = (4/3)× (22/7)×0.1053 m3
Hence, volume of the ball = 0.004851 m3