Sanjay borrowed ’900 at 4% per annum and ’1,100 at 5% per annum for the same duration at Simple Interest. If he had to pay ’364 in total as interest, what is the time period in years?

A sum becomes 2215 of itself in 6 years at simple interest. Find the rate of interest per annum.

In how many years will a sum of ₹5,500 amount to ₹6,600 at a simple interest rate of 5% per annum?

A sum of money amounts to ₹16000 in 6 years at simple interest of 25 percent per annum. What will be the total interest for 6 years?