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A is 20% more efficient than B. If A alone can do it in 22 days, how much time will they working together, take to complete a job?
1. 15 days
2. 12 days
3. 18 days
4. 20 days
5. 16 days

1 Answer

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Best answer
Correct Answer - Option 2 : 12 days

Let B make 100 units / day

A make 120 units / day

Total units to be produced = A’s 1 day capacity × time taken by A

⇒ 120u × 22

⇒ 2640 u

(A + B)’s 1 day work = 220u / day

2640u will be produced in, 2640 / 220days

⇒ 12 days

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