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A can do a work in 8 hours & B can do th...

A can do a work in 8 hours & B can do the same work in 12 hours. If they workalternatively (one hour A works and one hour B works) and A starts the work at 9 AM, then the work will be completed at __O'clock.

A

`10 : 30 P.M`

B

`7 : 30 PM`

C

`8 : 30 P.M`

D

`6 : 30 P.M`

Text Solution

Verified by Experts

The correct Answer is:
D
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