A is 40% more efficient than B and C is 20% less efficient than B. Working together, they can complete a task in 20 hours. In how many hours will A alone complete 35% of that task?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 16
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Understanding |
Application |
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Let the efficiency of B be x Efficiency of A will be = 1.4x Efficiency of C will be = 0.8x Efficiency ratio of A, B and C = 1.4x : x : 0.8x = 7 : 5 : 4 |
Total work = (7 + 5 + 4) × 20 = 320 35% of total work = 320 × [35/100] = 16 × 7 = 112 A alone complete 35% of that task = 112/7 = 16 days |