Mohan asked 36 men to build his house in 30 days. 50% of the work got completed in just 10 days. So, Mohan removed some workers. Now, how many persons does he need to complete the remaining work in decided time?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 18
Measure the work in man-days (one man working for one day). Half the house took 36 men 10 days, so the other half needs the same number of man-days.
Half the work \(=36\times10=360\) man-days
Days left in the decided time \(=30-10=20\)
Men needed \(\displaystyle =\frac{360}{20}=18\)