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Question

Twenty five workers were employed to complete a compound wall in 12 days.Five workers left after working for 4 days. The remaining 20 workers completed the work, in how many days the total job was completed?

A
15 days
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B
16 days
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C
14 days
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D
18 days
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Solution

The correct option is C 14 days
Total work = Number of workers x Number of days

Therefore, total work =25 workers×12 days.

As it is given that, 25 workers worked for 4 days and then 4 of them left, therefore, let remaining 20 workers worked for y days. Thus, we have:

25×12=(25×4)+(20×y)300=100+20y20y=30010020y=200y=20020y=10

Therefore, 20 workers worked for 10 days and the total job got completed in 10+4=14

Hence, total work was completed in 14 days.

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