Question
A and B started a retail store with initial investments
in the ratio 6:7 and their annual profits were in the ratio 3:4. If A invested the money for 7 months, then for how many months did B invest his money?ÂSolution
Suppose A invested Rs. 6x for 7 months and B invested 7x for y months then, ⇒  (6x × 7)/(7x × y) = 3/4 ⇒  y = (42x × 4)/(7x × 3) ⇒  y = 168x/21x ⇒  y = 8
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