R S Aggarwal Solutions for Chapter: Simple Interest, Exercise 1: EXERCISE 12A

At what rate per cent per annum will $\mathrm{Rs} 3600$ amount to $\mathrm{Rs} 4734$ in $3\frac{1}{2}$ years?

If $₹640$ amounts to $₹768$ in $2$ years $6$ months, what will $₹850$ amount to in $3$ years  at the same rate per cent per annum?

In what time will $₹5600$ amount to $₹6720$ at $8\%$ per annum?

A sum of money becomes $\frac{8}{5}$ of itself in $5$years at a certain rate of simple interest. Find the rate of interest.

A sum of money lent at simple interest amounts to $₹783$ in $2$ years and to $₹837$ in $3$ years. Find the sum and the rate per cent per annum.

A sum of money lent at simple interest amounts to $₹4745$ in $3$ years and to $₹5475$ in $5$ years. Find the sum and the rate per cent per annum.

Divide $₹3000$ into two parts such that the simple interest on the first part for$4$years at $8\%$ per annum is equal to the simple interest on the second part for $2$ years at $9\%$ per annum.

Divide $₹ 3600$ into two parts such that if one part be lent at $9\%$ per annum and the other at $10\%$ per annum, the total annum income is $₹333.$