Question

Hari as well as shyam working separately could mow field in 8 as well as 12 hours. In case they work in stretches of one hour alternately. Hair has been starting at 9

a.M. When would moving be completed

Answer 1

Dear Student:

In this case we can take 2 hours as one unit.

Part of the field moved by Hari and Shyam

In 2 hours(1 unit) =1/8+1/12=5/24.

Time taken to complete the work =1/5/24=24/5 unit of time.

The actual time taken by them to complete the work.

= 2*24/5= 9.6hours.

The work start at 9 AM then it will complete at 6:36 PM.

Hope it helps

Thanks

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