Unique Academic Board Solutions for Exercise 1: Practice Exercise

At the rate of $9\%$ p.a. simple interest, a sum of Rs. $5,400$ will earn how much interest in $1$ year $6$ months?

What will be the simple interest earned on an amount of Rs. $17,000$ in $9$ months at the rate of $7\frac{1}{2}\%$ p.a.?

At what rate percent of simple interest will a sum of money double itself in $12$ years?

A sum fetched a total simple interest of Rs. $4,016.25$ at the rate of $9$ p.c.p.a. in $5$ years. What is the sum?

In how many years will Rs.$150$ produce the same interest @ $8\%$ as Rs. $800$ will produce in $3$ years @ $4\frac{1}{2}\%$?

At what percent per annum will the simple interest on a sum of money be $\frac{2}{5}$th of the amount in $10$ years?

At what rate per cent per annum will a sum of money double in $16$ years?

How much time will it take for an amount of Rs. $450$ to yield Rs. $81$ as interest at $4.5\%$ per annum of simple interest?