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A finishes 6/7th of the work in 2z hours...

A finishes 6/7th of the work in 2z hours, B works twice as fast A and finishes the remaining work. For how long did B work?

A

`((2)/(3))z`

B

`((6)/(7)) z`

C

`((4)/(46))z`

D

`((3)/(18))z`

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Verified by Experts

The correct Answer is:
D
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