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A can do a work in 12 days while B can d...

A can do a work in 12 days while B can do same work in 18 days. How long(in days) will it take if they do the work together?
A किसी कार्य को 12 दिनों में कर सकता है जबकि B इसी कार्य को 18 दिनों में कर सकता है | यदि वे साथ कार्य करें तो इसे पूरा होने में कितने दिन लगेंगे ?

A

`5 3/4`

B

`7 1/5`

C

`6 1/5`

D

`6 2/3`

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