1.

A and B completed a work together in 5 days. had A worked at twice the speed and B at half the speed, it would have taken them four days to complete the job. How much time would it take for A alone to do the work?

A. 10 days
B. 20 days
C. 25 days
D. 15 days
E. 24 days
Answer» B. 20 days


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