A sum of money amounts to 5,200 in 5 years and to 5,680 in 7 years at simple interest. The rate of interest per annum is-

In how many years a sum of Rs. 3000 will yield an interest of Rs. 1080 at 12% per annum simple interest?

What annual instalment will discharge a debt of ₹ 6450 due in 4 years at 5% simple interest?

Alipta got some amount of money from her father. In how many years will the ratio of the money and the interest obtained from it be 10:3 at the rate of 6% simple interest per annum?

The sum of money that will yield Rs. 60 as simple interest at the rate of 6% per annum in 5 years is-

 ₹ 800 becomes ₹ 956 in 3 years at a certain rate of simple interest. If the rate of interest is increased by 4 %, what amount will ₹ 800 become in 3 years? 

A sum of money amounts to 5,200 in 5 years and to 5,680 in 7 years at simple interest. The rate of interest per annum is-

₹ 1,000 is invested at 5% per annum simple interest. If the interest is added to the Aprincipal after every 10 years, the amount will become 2,000 after