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Question 1:

Monu receives simple interest 5/7 of the principal amount on an amount of Rs.28000 in 15 years from his friend. What is the rate of interest per annum?

Question 2:

In how much time a sum of Rs. 10,000 will become Rs.14,641 at the rate of $10 \%$ per annum interest, while the interest is compounded annually.

Question 3:

A sum of Rs 10,500 amounts to Rs 13,650 in 2 years at a certain rate per cent per annum simple interest. The same sum will amount to what in 1 year at the same rate, if the interest is compounded half yearly (nearest to Rs.1)?

Question 4:

At what rate of interest will a sum of Rs 4,500 amount to Rs 6,525 at simple interest for 5 years?

Question 5:

In how much time will the simple interest on a certain sum of money be $6 / 5$ times of the sum at $20 \%$ per annum?

Question 6:

A sum of money becomes 4 times at simple interest in 10 years. What is the rate of interest?

Question 7:

A person invests money in three diffrent schemes for 4 years, 10 years and 15 years at $15 \%, 9 \%$ and $12 \%$ simple interest respestively. At the completion of each scheme, he gets the same interest. Find the ratio of his investments?

Question 8:

A scheme invests Rs. 1000 at simple interest rate of $5 \%$ on the condition that interest will be added to the principal after 10 yr. In how many years will it amount to Rs.2000?

Question 9:

The rate of interest for the first 2 years is 6% p.a., for the next 3 years is 10% p.a. and for the period beyond 5 years is 12% p.a. If a person gets Rs.12,771 as simple interest after 7 years, then how much money did he invest?

Question 10:

What will be the simple interest on a sum of Rs 2000 at the rate of $8.25\%$ per annum from 7 february 2022 to 20 april 2022?