Find out the capital required to earn a monthly interest of $Rs. 600$ per month as $6\%$ simple interest.

A man drives his income from an investment of $\mathrm{Rs}.2000$ at a certain rate of interest and $\mathrm{Rs}.1600$ at $2\%$ higher. The whole interest in $3$ years is $\mathrm{Rs}.960$. Find the rate of interest.

A sum of $Rs. 1550$ was lent partly at $5\%$ and partly at $8\%$ simple interest. The total interest received after $3$ yrs. was $Rs. 300$. The ratio of money lent at $5\%$ to $8\%$ is :

$Rs. 793$ is divided into three parts as such that their amount after $2, 3$ and $4$ yrs. may be equal, the rate of interest being $5\%$. Find the ratio between these parts.

A trader marks two prices on his goods one for the cash payment and the other at the credit of $1$ month. What will be the ratio between the two prices if the rate of simple interest is $4\%$ per annum ?

A man buys a house and pays $Rs. 8,000$ cash and $Rs. 9600$ at $5$ years credit at $4\%$ per annum simple interest. Find the cash price of the house.

Find the simple interest on $Rs. 600$ from $3^{rd}$ March to $15$ May of a year at $6\%$ p.a.?

A sum $Rs. 2,600$ is lent in two parts so that the interest on the first part for a period of $3$ years at $5\%$ may be equal to the interest on the second part for $6$  years at $4\%$. The second part is equal to :