Some practice questions
1. Arun can do a piece of work in 15 days .Sam can do it in 10 days how long will they take to work together?
Ans.
15*10/15+10 = 6 days [ short cut ab/a+b ]
2. P and Q can do a piece of work in 4 days. If P alone can complete the same in 12 days.In how many days can Q alone complete it?
Ans :
4*12/8 =6 days [ab/a-b]
3. 3 men can complete a work in 10 days.In how many days 10 men complete the same work?
Ans:
3*10/10 = 3
