A sum of Rs. 400 becomes Rs. 448 at simple interest in 2 years. In how many years, will the sum of Rs. 550 amounts to Rs. 682 at the same rate?

The simple interest on a sum of money for 10 year is Rs. 3130. If the principal becomes 5 times after 5 years, then what will be the total interest (in Rs) obtained after 10 years? 

If the simple interest on ₹ 1 for 1 month is 1 paisa, then the rate percent per annum will be 

The simple interest on a sum of money for 3 years is ₹240 and the compound interest on the same sum, at the same rate  for 2 years is ₹170. The rate of interest is 

Mr. Dutta desired to deposit his retirement benefit of ₹3 lacs partly to a post office and partly to a bank at 10 % and 6 %  simple interests respectively. If his monthly interest income was ₹ 2000, then the difference of his deposits in the post office and in the bank was -

A sum of money lent out at simple interest amounts to ₹720 after 2 years and 1020 after a further period of 5 years. Find the principal. 

Ratio of the principal and the amount after 5 year is 10:12. Then the rate of interest per annum is 

2 years, a sum was put at SI at a certain rate. If the rate was 3 % higher, it would have fetched 300 more. What will be the sum?