Question

A can do 75% of a job in 18 days and B can do 25% of the job in 12 days. If they work on it together, in how many days can they do 75% of the job?

Options:
1) 16
2) 8
3) 20
4) 12

Answer 1

12 days will be the answer

Answer 2

Person A:

75% = 18 days

100% = 18/75 x 100 = 24 days

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Person B:

25% = 12 days

100 % = 12/25 x 100 = 48 days

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Person A + Person B:

Total number of days = (48 x 24)/(48 + 24) = 16 days

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Find 75% job completed:

75% x 16 = 0.75 x 16 = 12 days

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Answer: They can finish 75% of the work in 12 days.