There is 40 % increase in an amount in 8 years at simple interest. What will be the compound interest  (in rupees) of Rs 30000 after 2 years at the same rate? 

The diameter of a toy wheel is 14 cm, what is the distance travelled by it in 15 revolutions? 

On selling an article for Rs 162 there is a loss of 10%.At what price it should be sell in order to gain a profit of 10%?

A and B together can plough a field in 10 hours but by himself A requires 15 hours. How long would B take to plough the same field?

Study the following graph to answer these questions :
Percent profit earned by two companies A & B over the years.
Profit = Income – Expenditure

Expenditure of Company B in years 1996 and 1997 were in the ratio of 5:7 respectively. What was the respective ratio of their incomes?

An alloy contains zinc, copper and tin in the ratio 2:3:1 and an other contains copper, tin and lead in the ratio 5:4:3. If equal weights of both alloys are melted together to form a third alloy, then the weight of lead per kg in the new alloy will be.