Bhagwanti inherited Rs 12000.00. She invested part of it as 10% and the rest at 12%. Her annual income from these investments is Rs 1280.00. How much did she invest at each rate ?

Q. Ram Lal invested a certain amount for three years, under compound interest compounded annually and received Rs.17820. If he had invested the same amount for six years at the same rate of interest compounded annually, he would have received Rs.49410. The amount (to the nearest integer in Rs.) he invested is___

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A man has part of Rs.4500 invested at 4% and the rest at 6%. If the annual return on each investment is the same, the average rate of interest which he realizes on the Rs.4500 is

The correct option is A 4.8%1x=12(16+14)∴x=4.8; orLet y be the amount invested at 4%. Then 0.04y=0.06(4500−y) and y=2700. Therefore the total interest is0.04(2700)+.06(1800)=216, and (216/4500).100=4.8%.

A man has part of $R s . 4500$ invested at $4$ % and the rest at $6$ %. If the annual return on each investment is the same, the average rate of interest which he realizes on the $R s . 4500$ is

The correct option is A $4.8$ %
$\frac{1}{x} = \frac{1}{2} (\frac{1}{6} + \frac{1}{4}) ∴ x = 4.8$ ; or
Let $y$ be the amount invested at $4$ %. Then $0.04 y = 0.06 (4500 - y)$ and $y = 2700$ . Therefore the total interest is
$0.04 (2700) + .06 (1800) = 216$ , and $(216 / 4500) . 100 = 4.8$ %.