Rs. 500 was invested at 12% per annum simple interest and a certain sum of money invested at 10% per annum simple interest. If the sum of the interest on both the sum after 4 years is Rs. 480, the latter sum of money is :
Rs. 500 was invested at 12% per annum simple interest and a certain sum of money invested at 10% per annum simple interest. If the sum of the interest on both the sum after 4 years is Rs. 480, the latter sum of money is :
[A]550
[B]450
[C]750
[D]600
600
Simple interest gained from Rs. 500 = 
Let the other principal be x.
S.I. gained = Rs. (480 – 240) = Rs. 240
Hence option [D] is the right answer.
