For doing a certain work, the efficiencies of A, B and C are in the ratio 2 : 3 : 5, working together, they can complete the same work in 15 days. B and C complete 80% of the original work in:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 15 days.
Calculations:
Let the efficiency of A, B and C be 2x, 3x and 5x
Total work = 10x × 15 = 150x units
80% of the total work = 150x × 80% = 120x
Required days = 120x/8x = 15 days