A) 700
B) 800
C) 900
D) 720
Correct Answer: A
Solution :
Let \[x\] men can finish the work in \[\frac{1}{2}\] day. Then, less days, more men required (indirect). \[\therefore \] \[\frac{1}{2}:18::20:x\] \[18\times 20=\frac{1}{2}x\] \[x=360\times 2\Rightarrow x=720\] Number of men to be added\[=(720-20)=700\].You need to login to perform this action.
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