Correct option is C
Given:
- A can complete the work in 28 days.
- B is 68% more efficient than A.
Formula Used:
- Efficiency and time are inversely proportional.
Solution:
Total Work = Efficiency of A Time taken by A = 28× 1 = 28 unit
Efficiency of B = 168% of A = 168/100 = 1.68A.
Time taken by B =Total Work / Efficiency of B = 28 / 1.68 = 50/3 days