Study the following graph carefully to answer the given questions

 T and V started the work. After 3 days Z joined them, who can complete alone the same whole work in 3 days. What is the total number of days in which they had completed the work?

A sum of money at double the rate of simple interest doubles itself in 10 years. In how much time will that amount be triple of itself?

What is the compound interest on Rs. 48,000 for 2 years at 20% p.a., if interest is compounded annually?

What is the value of ½ % in decimals ?

If the sum of a number and its reciprocal be 2, then the number is-

Two things were sold at same sale-price. One thing got 10% profit and another suffered 10% loss. The difference of their purchase price will be in multiple of which number.Tell_____. 

P can do a piece of work in 60 days & Q can do the same work in 50 days. Find the ratio of working efficiencies of P to Q.

A sum of money doubles itself at compound interest in 15 years. In how many years it  will become eight times?