Practicing Success
If 20 persons can do a work in 15 days, then how many more persons are required to do it in 10 days ? |
15 30 10 20 |
10 |
We have, 20 persons can do a work in 15 days Total work = Persons × Time = 20 × 15 = 300 Now this work has to be completed in 10 days, so the persons required = 300/10 = 30 Extra workers = 30 - 20 = 10 |