Answer : 2.5 years
Q2.A certain sum of money amounts to Rs 6300 in 5 years at 515% simple interest per annum. Find the sum.
Answer : Rs5000
Q3. Ratio of principal and the amount after 2 years is 20: 30. Find the rate of simple interest per year.
Answer : 25 %
Q4. What will be the interest after 2 years on a sum of Rs 1440, at the rate of interest 813% compounded annually?
Answer : Rs 250
Q5. Peter lent some amount of money at 5% simple interest and an equal amount of money at 7% simple interest, each for 3 years. If total interest earned on both the sum was Rs 360, what amount was lent in each case?
Answer : Rs 1000
Q6.Simple interest on a sum is 25% of the principal and the number of years is equal to rate percent per annum. Find the rate of interest.
Answer : 5%
Q7.What will be the amount of the sum Rs 1200 for 112 a year at 40% interest compounded quarterly?
Answer : Rs 2126
Q8.At what rate of interest per annum will the simple interest on a sum of money be 25% of the principal in 5 years?
Answer : 5%
Q9.A certain sum of money amounts to Rs 880 in 2 years at the annual rate of 5% simple interest. Find the sum.
Answer : Rs 800
Q10. What will be the interest on a sum of Rs 10000 in 1 year at 6% per annum, if interest is being compounded half-yearly?
Answer :Rs 609
Q11.Find the sum if simple interest at a% per annum for ‘a’ year is Rs ‘a’.
Answer : Rs100/𝑎
Q12.A sum of Rs 800 amounts to Rs 950 in 3 years at simple interest. Find the amount received if the rate of interest is increased by 3 %.
Answer :Rs 1022
Q13. Population of a village decreases at the rate of 12% per annum. If its population 2 years ago was 62500, find its present population.
Answer : 48400
Q14. At what percent per annum will sum of Rs 8000 amounts to Rs 9261 in 3 years, if interest is compounded annually?
Answer : 5%
Q15.A sum becomes Rs 64827 in 3 years at 5% per annum compound interest. Find the sum.
Answer : Rs 56000
