A person invested some amount at the rate of 12% simple interest and a certain amount at the rate of 10% simple interest. He received yearly interest of Rs 130. But if he had interchanged the amounts invested, he would have received Rs 4 more as interest. How much did he invest at 12% simple interest? (a) Rs 400 (b) Rs 500 (c) Rs 700 (d) Rs 800

The simple interest for Rs 1500 at 8% per annum for 3 years is (a) Rs 400 (b) Rs 360 (c) Rs 450 (d) Rs 500

Susan invested certain amount of money in two schemes A and B, which offer interest at the rate of 8% per annum and 9% per annum, respectively. She received Rs. 1860 as annual interest. However, had she interchanged the amount of investments in the two schemes, she would have received Rs. 20 more as annual interest. How much money did she invest in each scheme ?

A trust invested some money in two types of bonds. The first bond pays 10% interest and second bond pays 12% interest. The trust received Rs. 2,800 as interest. However, if trust had interchanged money in bonds, they would have got Rs. 100 less as interest. Using matrix method, find the amount invested by the trust.

The amount of Rs 25,000 at 8% per annum for 6 years under simple interest is (a) Rs 35,000 (b) Rs 37,000 (c) Rs 45,000 (d) Rs 47,000

The simple interest on a certain sum for 3 years at 10% per annum is Rs. 829.50. Find the sum.

What principal will amount to Rs 900 in 6 years at 10% simple interest?

Find the rate of interest when : simple interest on Rs 1625 in 2 1/2 years is Rs 325 .

At what rate per cent of simple interest will the interest on Rs. 3,750 be one-fifth of itself in 4 years? To what will it amount in 15 years ?

A trust invested some money in two type of bonds. The first bond pays 10% interest and second bond pays 12% interest. The trust received Rs. 2,800 as interest. However, if trust had interchanged money in bonds, they would have got Rs. 100 less than interest. Using matrix method, find the amount invested by the trust. Interest received on this amount will be given to help age India as donation. Which value is reflected in this question?

How long will it take for Rs 1860 invested at the rate of 9.5 % per annum simple interest to amount to Rs 2449 ?