R. Gupta Solutions for Exercise 14: MULTIPLE CHOICE QUESTIONS

In a mixture of $60$ litre, the ratio of ethanol to ether is $4 : 1$. The quantity of ether to be added to the mixture to make this ratio $2 : 1$ will be:

The price of a variety of a commodity is Rs.$5$ per kg and that of another is Rs.$8$ per kg. The ratio in which two varieties should be mixed so that the price is Rs.$7$ per kg will be:

A confectioner sells the milk after mixing some water in it at the same rate at which he bought it. If he gains$25\%$ in this way, the quantity of water mixed with per litre of milk is:

A milk seller bought some milk at the rate of Rs. $16$ per litre. He mixed water$\frac{1}{4}$th of it and sold the mixture at the cost price. Assuming the price of water as Rs.$16.00$ per litre. The gain % is:

Ramesh has Rs.$3,600$. He invests a part of it at $3\%$ per annum and the remaining at $5\%$ higher rate of simple interest. He gets in all Rs.$540$ at the end of $3$ years. The sum invested at $3\%$ per annum is: