Mathematics · Time and Work
Ian can do a piece of work by himself in 15 hours while Manas can do the same work alone in 21 hours. Starting with Ian, they work for an hour each alternately till the work is completed. Only during the last slot, one can work for less than an hour if the work gets over. How long will it take them to complete the work?
- 117 hours 50 minutes
- 217 hours 48 minutes
- 317 hours 30 minutes
- 417 hours 24 minutes✓
Correct answer
17 hours 24 minutes
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