CBSE Notes, Lectures

CBSE - Mathematics - Surface Areas and Volumes

Surface Areas and Volumes

NCERT Exercise Exercise 13.8

Find the amount of water displaced by a solid spherical ball of diameter
(i) 28 cm (ii) 0.21 m

(i) 28 cm

Solution: Volume of sphere = 4/3 π r3
= (4/3) X (22/7) X 283 = 91989.33 cubic cm

(ii) 0.21 m

Solution: Volume of sphere = 4/3 π r3
= (4/3) X (22/7) X (0.21)3 = 0.38808 cubic m

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