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96. The ratio of the heights of two right circular cones is 25 : 64 and the ratio of their diameters is 4 : 5. The ratio of their volumes is
1 : 3
1 : 4
5 : 8
1 : 2
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97. If A = {x : x is a letter in word BELOW}, B = {x : x is a letter in word WOOL} and C = A - B, then the number of subsets of C is
1
2
3
4
98. The perimeter of a rhombus whose diagonals are 10 cm and 24 cm is
120 cm
34 cm
68 cm
52 cm
99. The number of observations in a survey is 40. If the mean of the first 10 observations is 4.5 and that of remaining is 3.5, then the mean of the whole survey is
2.82
3.80
3.75
4.25
100. A right circular cylinder of maximum volume is cut from a solid cube of edge 14 cm. The total surface of the cylinder is
924 cm2
1134 cm2
2464 cm2
616 cm2
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