A school has 8 periods of 45 min each, everyday. How long will each period be if the school has to have 9 periods everyday, assuming the working hours to be the same?

Study the following table carefully and answer the questions given below.

What was approximate percentage increase in the number of students in Commerce discipline from 2003 to 2004?

If there is a 25 percent reduction in the price of rice, a person can buy 10 kg more rice for Rs 600. The reduced price per kg of rice is.

Chandu bought a watch at 20 percent discount on mark price but sold it at mark price. Find the percentage of profit.

If Cost price of an article is Rs.220 and profit is 20 %, then what will be the selling price of the article?

The average age of 6 members of a family is 25 years. If the youngest member of the family is 15 years, old then what was the average age (in years) of the family at the time of the birth of the youngest members?

Three pipes, A B and C, can fill a cistern in 12, 18 and 24 minutes, respectively. If all the pipes are opened together for 7 minutes, what will be the volume of the water that overflows as the percentage of the total volume of the cistern?

A business Rs. 3500 Starts from, after 5 months B becomes his partner, after one year the profit between the two is divided in the ratio of 2: 3, then find the capital investment of B.