Monicaa Abhijit Solutions for Chapter: Compound Interest, Exercise 6: REVIEW EXERCISES

Compound interest is

Devesh gave Manav $₹1,250$ on compound interest for $2$ years at the rate of $12\%$ per annum. How much less would Devesh have got had he given the money to Manav for $2$ years on simple interest at the rate of $4\%$ per annum?

Pratap borrowed  $₹10,000$ from a bank at the rate of $10\%$per annum simple interest and lent it to Gaurav at the rate of $10\%$ per annum compound interest. What will be his gain after $3$years?

A sum compounded annually becomes $\frac{729}{512}$ times of itself in $3$ years. Find the rate of interest per annum.

Kusum and Ravi borrowed $₹80,000$ and $₹60,000$ respectively for a period of $3$ years. Kusum paid simple interest at the rate of $20\%$ per annum, while Ravi paid compound interest at the rate of $20\%$ per annum compounded annually. Who paid more interest and by how much?

The difference between the simple interest and the compound interest on a certain sum for $2$ years at the rate of $10\%$ is $₹50$. Find the principal.

In how many years will a sum of  $₹30,000$ amount to $₹31,827$at the rate of $6\%$per annum compounded semi-annually?

A library had $8,000$ registered members. The membership increased at the rate of $5\%$ every six months. After what time will the total membership be $9,261$?