A can do a work in 12 days. B's efficiency to do the work is 50% more than that of A. In how many days will B be able to do the work?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 8
Efficiency is the work done in a day, so for the same work the time taken is inversely proportional to efficiency.
B’s efficiency is 50% more than A’s, that is, \(\frac{3}{2}\) of A’s
B therefore takes \(\frac{2}{3}\) of A’s time: \(\displaystyle \frac{2}{3}\times12=8\) days