A invests on some scheme at 5% and B at 3% for two years. If the total sum invested by A and B is 4000 and the simple interest received by both is same then find the amount invested by A.
Let the amount invested by A be Rs y , then amount invested by B be Rs (4000-y)
Rate of interest for A = 5%
rate of interest for B = 3%
time = 2 years
As it is given that interest for both are same .So,
$$\frac{y\times5\times2}{100}$$ = $$\frac{(4000-y)\times3\times2}{100}$$
y = Rs 1500
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