- 1 hour
- 2 hours
- 3 hours
- 4 hours
- 5 hours
Answer: Option 1
Difference in times required by the first man (A) and second man (B) = 3 hours. Also, if ta and tb are the respective times, then tb - ta = 3 . . . . . . . . . ..(1) Also, B alone be take = (ta + 3) h According to the question, 2tb - ta = 8 2 × (ta + 3) - ta = 8 [Using equation (1)] ta = 2 hours. Now B and woman together take 2 hours and A also take 2 hours, so time required will be half when all 3 work together. So in 1 hour work would be completed.