A is twice as good a workman as B and they together took 7 days to do a piece of work. B alone can do it in Options: A . &nbsp18 days B . &nbsp21 days C . &nbsp24 days D . &nbsp none of these

A is twice as good a workman as B and they together took 7 days to do a piece

Question

A is twice as good a workman as B and they together took 7 days to do a piece of work. B alone can do it in

Options:

A . 18 days

B . 21 days

C . 24 days

D . none of these

Answer: Option B

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Question 1. A can do a piece of work in 40 days. B can do the same in 30 days. A started alone but left the work after 10 days, t....10 days. C alone can do the whole work in

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