Babita is 1.25 times as efficient as Deepak. Working together, the duo can complete a piece of work in 40 days. In how many days can Deepak alone complete the same piece of work?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 90
Given that
Babita is 1.25 times as efficient as Deepak.
The efficiency ratio of Babita and Deepak = 5 : 4
They together can complete a piece of work in 40 days.
Hence, Deepak alone can complete the same piece of work in = 9 × 40/4 = 90 days