A company has 12 machines of equal efficiency in its factory. The annual manufacturing expenses are Rs. 24,000 and the e…

The current birth rate per thousand is 32, whereas the corresponding death rate is 11 per thousand. The net growth rate …

The average of marks obtained by 100 candidates in a certain examination is 30. If the average marks of passed candidate…

The cost of packaging of the mangoes is 40% the cost of fresh mangoes themselves. The cost of mangoes increased by 30% b…

Gauri went to the stationers and bought things worth Rs. 25, out of which 30 paise went on sales tax on taxable purchase…

From a container having pure milk, 20% is replaced by water and the process is repeated thrice. At the end of the third …

The price of a commodity rises from Rs. 6 per kg to Rs. 7.50 per kg. If the expenditure cannot increase, the percentage …

An empty fuel tank of a car was filled with A type petrol. When the tank was half-empty, it was filled with B type petro…