R S Aggarwal Solutions for Chapter: Simple Interest, Exercise 2: EXERCISE 12B

At what rate per cent annum simple interest will a sum double itself in $10$ years?

The simple interest at $x\%$ per annum for$x$ years will be $₹x$on a sum of
 

The simple interest on a sum for $5$ years is $\frac{2}{5}$ of the sum. The rate per cent per annum is
 

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

A sum of $₹600$ amounts of $₹720$in $4$ years. What will it amount to if the rate of interest is increased by$2\%$?
 

$x, y$ and $z$ are three sums of money such that $y$ is the simple interest on$x$ and $z$ is the simple interest on $y$ for the same time and same rate. Which of the following is correct?

 

In how much time would the simple interest on a certain sum be$0.125$times the principal at $10\%$ per annum?

At which sum will the simple interest at the rate of $3\frac{3}{4}\%$ per annum be $₹210$ in $2\frac{1}{3}$ years?