S K Gupta and Anubhuti Gangal Solutions for Chapter: Compound Interest, Exercise 3: Exercise 8(C)

Find the rate per cent per annum, if compounded yearly, 
Principal$=₹196$, amount$=₹225$, time$=2$ years

Find the rate per cent per annum, if compounded yearly, 
Principal$=₹3136$, compound interest$=₹345$, time$=2$ years

$₹8000$ becomes $₹9261$in certain interval of time at the rate of $5\%$ per annum C.I, find the time.

Determine the rate of interest at which a sum of money will become $\frac{216}{125}$ times the original amount in $1\frac{1}{2}$ years, if the interest is compounded half-yearly.

In what time will $₹2000$ amount to $₹2662$ at $20\%$ per annum compounded half-yearly?

The difference between the simple interest and compound interest compounded annually in $2$ years at $10\%$ per annum is $₹65$. The sum is

At what rate of compoynd interest per annum will a sum of $₹2000$ become $₹2332.80$in $2$ years, interest compounded annually?

An amount of $₹x$ at compound interest at $20\%$ per annum for $3$ years becomes $y$. What is $y:x?$