ASSIGNMENT ON TIME AND WORK

SOME PROBLEMS ON TIME AND WORK

 

1. 20 men can cut 30 trees in 4 hours. If 4 men leave the job, how many trees will be cut in 6 hours?

2. 10 men can cut 15 trees in 2 hours. If 2 men leave the job, how many trees will be cut in 3 hours?

3. 10 men can prepare 20 toys in 3 days working 12 hours a day. Then in how many days can 24 men prepare 32 toys working 4 hrs a day?

4. 20 men can prepare 40 toys in 24 days working 18 hours a day. Then in how many days can 36 men prepare 48 toys working 16 hrs a day?

5. A and B can do a piece of work in 6 days, A and C in 5½ days, B and C in 4 days. In what time could each do it?

6. A and B can mow a field in 3½ days, A and C in 4 days, B and C in 5 days. In what time could they mow it, all working together?

7. A can do a piece of work in 6 days. B takes 8 days. C takes as long as A and B would take working together. How long will it take B and C to complete the work together?

8. A does 7/10 of a piece of work in 15 days. He does the remainder with the assistance of B in 4 days. In what time could A and B together do it?

9. Five men can do a piece of work in 2 hours, which 7 women could do in 3 hours, or 9 children in 4 hours. How long would 1 man, 1 woman and 1 child together take to do the work?

10.  A takes twice as much times B and thrice as much time as C to finish a piece of work, working together they can finish the work in 2 days, find the time each will take to finish the work.

 

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