Question
The ratio of investment of A and B is 6:7 respectively.
If the rate of interest for both A and B is 12% p.a and time duration for A and B is 5 years and 4 years respectively. The difference of their amount received is Rs.3800 then what was the investment of A?Solution
ATQ,
Let A's investment = 6x, B's = 7x Rate = 12%, Time: A = 5 yrs, B = 4 yrs Use simple interest formula: A's Amount = 6x + (6x×12×5)/100 = 9.6x B's Amount = 7x + (7x×12×4)/100 = 10.36x Difference = 10.36x - 9.6x = 0.76x = 3800 → x = 3800 / 0.76 = 5000 A’s investment = 6x = 6 × 5000 = 30,000
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