A square room has a verandah of uniform width of 3m around it. The area of the verandah is 288 sq m. Find the cost of flooring the room if the cost of flooring per square metre is Rs. 15.

A person sells two fans for Rs. 3200. The cost price of the first fan is equal to the selling price of the second fan. If the first is sold at 40% loss and the second at 100% gain, what is total profit or loss ?

Direction (Q. 6-10) : In the following pie-chart, the distribution of students of a school is given. The table gives the ratio of boys to girls among them. Total students studying in six different classes of the school is 1200.

Class

Boy : Girls

V

3 : 2

VI

3 : 1

VII

5 : 3

VIII

8 : 7

IX

4 : 3

X

1 : 1

What is the average of the number of girls studying in all six classes ?

The difference between the number of boys and the number of girls in class V is what percentage of the difference between the number of boys and the number of girls in class VII ?