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A does 4/5 of a work in 20 days. He then...

A does `4/5` of a work in 20 days. He then calls B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work ? a. `23\ d a y s` b. `37\ d a y s` c. `37 1/2 d a y s` d. `40 d a y s`

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RS AGGARWAL-TIME AND WORK-All Questions
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