A sum of Rs. 12,800 is invested separately at 15% per annum and the remaining at 12% per annum simple interest. If the total interest at the end of 3 years is Rs. 5,085, then how much money was invested at 15% per annum?
A. Rs. 5,200
B. Rs. 7,500
C. Rs. 5,800
D. Rs. 5,300
Answer: Option D
Solution(By Examveda Team)
$$\eqalign{ & {\text{Sum}} = 12,800 \cr & {{\text{I}}^{{\text{st}}}}{\text{ part}} = x \cr & {\text{I}}{{\text{I}}^{{\text{nd}}}}{\text{ part}} = \left( {12,800 - x} \right) \cr & x \times \frac{{15}}{{100}} + \left( {12,800 - x} \right)\frac{{12}}{{100}} = \frac{{5,085}}{3} \cr & \frac{{3x}}{{100}} + 128 \times 12 = 1,695 \cr & \frac{{3x}}{{100}} = 1,695 - 1,536 \cr & \frac{{3x}}{{100}} = 159 \cr & {\text{then }}x = 5,300 \cr} $$Related Questions on Interest
Find the simple interest on Rs. 5200 for 2 years at 6% per annum.
A. Rs. 450
B. Rs. 524
C. Rs. 600
D. Rs. 624
Rs. 1200 is lent out at 5% per annum simple interest for 3 years. Find the amount after 3 years.
A. Rs. 1380
B. Rs. 1290
C. Rs. 1470
D. Rs.1200
E. Rs. 1240
Interest obtained on a sum of Rs. 5000 for 3 years is Rs. 1500. Find the rate percent.
A. 8%
B. 9%
C. 10%
D. 11%
E. 12%
Rs. 2100 is lent at compound interest of 5% per annum for 2 years. Find the amount after two years.
A. Rs. 2300
B. Rs. 2315.25
C. Rs. 2310
D. Rs. 2320
E. None of these
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