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A father can do a job as fast as his two sons working together. If one son does the job in 3 hours and the other in 6 hours, the number of hours taken by the father, to do the job alone is
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- 1
- 2
- 3
- 4
Correct Option: B
Work done by two sons in an hour
| = | + | = | ||||
| 3 | 6 | 2 |
∴ Work done by father in an hour
| = | 2 |
∴ Required time = 2 hours
