A) 110 day
B) 90 day
C) 130 day
D) 120 day
Correct Answer: D
Solution :
(\[(A+B)\]?s 20 days' work \[=\frac{1}{60}\bullet 40=\frac{2}{3}\] Remaining work \[=1-\frac{2}{3}=\frac{1}{3}\] Now, \[\frac{1}{3}\] work is done by A in 40 days. Whole work will be done by A in \[(40\,\times 3)\]= 120 days.You need to login to perform this action.
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