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      Question

      A and B started a retail store with initial investments

      in the ratio 9:10 and their annual profits were in the ratio 3:4. If A invested the money for 5 months, then for how many months did B invest his money?ย 
      A 5 Correct Answer Incorrect Answer
      B 8 Correct Answer Incorrect Answer
      C 7.5 Correct Answer Incorrect Answer
      D 6 Correct Answer Incorrect Answer

      Solution

      Suppose A invested Rs. 9x for 5 months and B invested 10x for y months then, โ‡’ ย (9x ร— 5)/(10x ร— y) = 3/4 โ‡’ ย y = (45x ร— 4)/(10x ร— 3) โ‡’ ย y = 180x/30x โ‡’ ย y = 6

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