Question
The volume of a hemisphere is 2425 (1/ 2) cm3
. Find its radius (Take p = 22/7)Solution
Let the radius of the hemisphere be R Â (2/3) x (22/7) Ă— R3 = 2425.5 (2/3) Ă— (22/7) x RÂł = (4851/2) Â (2/3) Ă— (22/7) Ă— RÂł = (99 Ă— 49)/2 RÂł = (3 Ă— 3 Ă— 11 Ă— 7 Ă— 7 Ă— 3 Ă— 7)/ (2 Ă— 2 Ă— 2 Ă— 11) RÂł = (3 Ă— 3 Ă— 3 Ă— 7 Ă— 7 Ă— 7)/ (2 Ă— 2 Ă— 2) R = (3 Ă— 7)/2 R = 10.5 cm. The radius of the hemisphere is 10.5 cm
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