A) \[17\frac{1}{7}\]days
B) \[15\frac{1}{2}\]days
C) \[20\frac{1}{4}\]days
D) \[12\frac{1}{4}\]days
Correct Answer: A
Solution :
\[x=30,\]\[y=40\] By shortcut method, Time taken to complete the work by both together \[=\frac{x\times y}{x+y}=\frac{30\times 40}{30+40}=\frac{1200}{70}\] \[=17\frac{1}{7}\]daysYou need to login to perform this action.
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