A) 50
B) 60
C) 48
D) 54
Correct Answer: B
Solution :
(A + B)?s 1 day?s work \[=\frac{1}{30}\] (A + B)?s 20 day?s work \[=\frac{20}{30}=\frac{2}{3}\] Remaining work \[=1-\frac{2}{3}=\frac{1}{3}\] Now, \[\frac{1}{3}\] part of work is done by A in 20 days. \[\therefore \] Whole work will be done by A alone in \[20\times 3=60\] daysYou need to login to perform this action.
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