A girl spends 20% of her monthly income on rent, out of remaining she spends 25% on food and 20% on makeup. The difference between amount spends by the girl on food and makeup is Rs. 1920. Find the monthly income of the girl (in Rs.)?

If the price of rice increases by 20% and a person reduces its consumption by 20%, by what percentage will his total expenditure on rice decrease?

If 30% of a number exceeds 20% of it by 24, then the number is:

The count of a certain breed of bacteria was found to increase at the rate of 4% per hour and then decrease by 2% per hour. Find the bacteria at the end of 2 hours if the count was 2,00,000 initially.

Kiran spends 75% of his income. If he saves ₹90000, then his income (in ₹) is:

A bus is moving at a speed of 82 km/hr. If its speed is reduced by 28%, then what will be the new speed of the bus (in km/hr)?

A person spends 50% of his monthly salary on house rent. If he spends ₹912 on transport and ₹3,799 on groceries every month and saves the remaining ₹131, then find his monthly salary (in ₹).