Q2 of 70 Page 21

Find the volume of a sphere whose diameter is:

(i) 14 cm


(ii) 3.5 dm


(iii) 2.1 m

Volume of sphere = (1/6)πd3


(i) Diamter is 14 cm


⇒ Volume of the sphere = (1/6) × (22/7) × 143 = 1437.33 cm3


(ii) Diamter is 3.5 dm = 35 cm


⇒ Volume of the sphere = (1/6) × (22/7) × 353 = 22.46 dm3


(iii) Diameter is 2.1 m


⇒ Volume of the sphere = (1/6) × (22/7) × 2.13 = 4.851 m3


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