The volumes of two spheres are in the ratio 64: 27. The ratio of their surface areas is
(a) 3: 4
(b) 4 : 3
(c) 9: 16
(d) 16: 9
Solution:
Ratio in volumes of two spheres = 64: 27
If a cone, a hemisphere and a cylinder have equal bases and have same height, then the ratio of their volumes is
(a) 1 : 3: 2
(b) 2 : 3: 1
(c) 2: 1 : 3
(d) 1: 2 : 3
Solution:
If a cone, a hemisphere and a cylinder have equal bases = r (say)
and height = h in each case and r = h
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