If the length of a rectangle increased by 20 % and breadth is decreased by 12.5 % Find the percentage increase in the Area ?

The expenses on rice, fish and oil of a family are in the ratio 12 : 17 : 3. The price of these articles are increased by 20 % , 30 % and 50 % respectively. The total expenses of family on these articles are increased by: 

Two students appeared for an examination. One of them secured 20 marks more than the other and his marks were 55% of the sum of their marks. The marks obtained by them are : 

A box contains 56 in the form of coins of one rupee, 50 paise and 25 paise. The number of 50 paise coins is double the number of 25 paise coins and four times the number of one rupee coins. How many 50 paise  coins are there in the box?

If income tax is increased by 24 % , the net income is reduced by 1 % . The rate of income tax is 

In an examination, 93% of students passed and 252 failed. The total number of students appearing at the examination was:

In an examination, 50% of the students passed in Science and 75% passed in Social Science, while 20% students failed in both the subjects. If 270 students passed in both subjects, find the total number of students who appeared in the exam?