| Q.17 | Ten men begin to do a work. But after some days, four of them left the job. As a result, the job that could have been completed in 40 days is completed in 50 days. How many days after the commencement of the work did the four men leave? | |
| Ans | 1. 25 | |
| 2. 20 | ||
| 3. 30 | ||
| 4. 35 |
Correct Ans Provided: 1