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A businessman sold 4/5 of his stock at a gain of 20% and the rest at a gain of 15%. The overall percentage of gain to the businessman is: 1] 16% 2] 19% 3] 21% 4] 20%

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L&T Other Question
If 40% of A = B and 30% of B = C, then 20% of A + C) is: 1] 56% of B 2] 38% of B 3] 46% of B 4] 28% of B If radius of the base and height of a right circular cylinder are each increased by 20%, then volume of the cylinder will increase by:
A) 44% B) 68% C) 72.80% D) 64.6%