The speed of a ball of radius 2 cm in a viscous liquid is 20 cm/s. Then the speed of
ball of radius 1 cm in the same liquid is
(A) 5 cm/s
(B) 8 cm/s
(C) 10 cm/s
(D) 4 cm/s
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Answer:
(a) 5 cm/s
Explanation:
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