MATH DOSE 10

1. By selling two articles on 800 a person got profit of cost price of 3 article find the profit percent

2. The sum of internal angle of regular polygon is 1260. What is difference between exterior and interior angle of polygon?

3. A man bought two articles for 4185 each. He sold first article at loss of 15% at what profit percent other article be sold for no gain/no loss.

4. If x – 4y = 0 and x + 2y = 24, then what is the value of (2x + 3y)/(2x – 3y)?

5. A man is running at the speed of 20 km/hr. What is time (in seconds) taken by man to cover one round of a circular garden of radius 350 metres? (Answer – 396)

6. A solid cube is cut into 27 identical cubes. What is the percentage increase in the total surface area? (Answer- 200%)