Correct Answer - Option 2 : 20 days
Given:
A can complete a work in 28 days
Efficiency of B = 140% of efficiency of A
Formula Used:
Work = Efficiency × Time
Calculation:
Let the efficiency of A be a
Efficiency of B = 140/100 × a
⇒ 1.4a
Total work = 28 × a days
⇒ 28a days
Time taken by B to complete the same work = 28a/1.4a days
⇒ 20 days
∴ B will take 20 days to complete the same work.
