Chapter 14 Compound Interest – Exercise 14.3 | Set 1Question 15. Find the rate percent per annum, if Rs. 2000 amount to Rs. 2315.25 in a year and a half, interest being compounded six monthly.Solution: Show
Question 16. Find the rate at which a sum of money will double itself in 3 years, if the interest is compounded annually.Solution:
Question 17. Find the rate at which a sum of money will become four times the original amount in 2 years, if the interest is compounded half-yearlySolution:
Question 18. A certain sum amounts to Rs. 5832 in 2 years at 8% compounded interest. Find the sum.Solution:
Question 19. The difference between the compound interest and simple interest on a certain sum for 2 years at 7.5% per annum is Rs. 360. Find the sum.Solution:
Question 20. The difference in simple interest and compound interest on a certain sum of money at 623 % per annum for 3 years in Rs. 46. Determine the sum.Solution:
Question 21. Ishita invested a sum of Rs. 12000 at 5% per annum compound interest. She received an amount of Rs. 13230 after n years. Find the value of n.Solution:
Question 22. At what rate percent per annum will a sum of Rs. 4000 yield compound interest of Rs. 410 in 2 years?Solution:
Question 23. A sum of money deposited at 2% per annum compounded annually becomes Rs. 10404 at the end of 2 years. Find the sum deposited.Solution:
Question 24. In how much time will a sum of Rs. 1600 amount to Rs. 1852.20 at 5% per annum compound interest?Solution:
Question 25. At what rate percent will a sum of Rs. 1000 amount to Rs. 1102.50 in 2 years at compound interest?Solution:
Question 26. The compound interest on Rs. 1800 at 10% per annum for a certain period of time is Rs. 378. Find the time in years.Solution:
Question 27. What sum of money will amount to Rs. 45582.25 at 6 ¾ % per annum in two years, interest being compounded annuallySolution:
Question 28. Sum of money amounts to Rs. 453690 in 2 years at 6.5% per annum compounded annually. Find the sum.Solution:
What will be the compound interest on Rs 12000 in 2 years when rate of interest is 9% per annum compounded annually?Detailed Solution
∴ Compound Interest is Rs. 1230.
How much will RS 12000 amounts to in 2 years at compound interest?⇒13356−12000=1356Rs.
What will be the compound interest earned on an amount of Rs 12500 in 2 years at 6% pa?12500×115100×116100=Rs. 16675.
What will be the simple interest on rupees 12000 for 2 years at 10% per annum?[or directly=Rs. 14520 - Rs. 12000 = Rs. 2520]
|