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ATQ, Difference between the profit obtained by Amit and Ben = 300 × 3 = Rs.900 Profit obtained by Amit = (4100 – 900)/2 = 3200/2 = Rs.1600 Profit obtained by Ben = 4100 – 1600 = Rs.2500 (3600 × x)/(4500 × (x + 3)) = 16/25 4x/(5 × (x + 3)) = 16/25 x/(x + 3) = 4/5 5x = 4x + 12 x = 12 months Therefore, the Investment period of Ben will be = 12 + 3 = 15 months
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