A sum is lent at `10%` per annum. Simple interest willget doubled in how many year?

A borrows Rs. 800 at the rate of 12% per annum simple interest and B borrows Rs. 910 at the rate of 10% per annum, simple interest. In how many years will their amounts of debt be equal ?

A borrows ₹ 8000 at 12% per annum simple interest and B borrows ₹ 9100 at 10% per annum simple interest. In how many years will their amounts be equal?

A sum of ₹ 4000 is lent on simple interest at the rate of 10% per annum. Simple interest for 5 years is how much more than the simple interest for 3 years?

A sum is split into two equal parts. One of part is lent at simple interest at 20% per annum for 6 years. The other part is lent at 40% per annum simple interest for 2 years. The difference in the interest is Rs 71. Find the total sum in Rs.

What sum will amount to ₹5525 at 10% per annum simple interest in 3 years?

If Rs 6000 is lent at 10% per annum, interest being compounded annually, what is the interest for the 3rd year?