Instructions

For the following questions answer them individually

Question 1

In a hostel of 50 girls there are food provisions for 40 days. If 30 more girls join the hostel, the food provisions will last for:

Question 3

A man bought article and sold it at a gain of 10% . If he had bought it at 20% less and sold it for Rs.10 more, he would have made an profit of 40%. The cost price of the article is:

Question 4

At what rate percent per annum compound interest, will Rs. 10,000 amount to Rs.13,310 in three years ?