The ratio of the efficiencies of A, B and C is 4 : 5 : 3. Working together, they can complete that work in 25 days. A and C together will complete 35% of that work in:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 15 days
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Concept |
Understanding |
Application |
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Work efficiency Total work = Efficiency × Time |
Ratio of efficiencies of A, B and C = 4 : 5 : 3 Suppose the efficiencies are 4x, 5x and 3x |
Working together, they can complete task in 25 days: Total work = (4x + 5x + 3x) × 25 = 300x 35% of the total work = 300x × 0.35 = 105x 35% of the total work completed by A and C together in = 105x/(4x + 3x) = 105/7 = 15 days |