Question

Two brothers together run a small business, but after 4 years borrowing 15000 from a bank at the rate of 12% annual simple interest, how much interest will they have to pay for that rupee ?????

answer ​

Answer 1

Answer:

Let x, y and z be the amounts that Khan invests in schemes A, B and C respectively. Then, we can write using the formula for S.I., : [{x×10×1}/100] + [{y×12×1}/100] + [{z×15×1}/100] = Rs. 3200. Also, we have the conditions that 10x + 12y + 15z = Rs. 320000.