A can do 1/5 of work in 10 days, B can do 1/3 of the work in 25 days. In how many days can they do half of the work working together?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 15
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Understanding |
Application |
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A can do 1/5 of work in 10 days, B can do 1/3 of the work in 25 days. |
So, Time in which A can complete the job = 10 × 5 = 50 days And Time in which B can complete the job = 25 × 3 = 75 days So, Time in which they together can complete the job = 1/(1/50 + 1/75) = 1/(1/30) = 30 And Time in which they together can complete half of the job = 15 days |