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Multiple Choice Questions

A contractor undertakes to make a mall in 60 days and he employs 30 men After 30 days it is found th...........

Math and Mental Ability Time and work

A contractor undertakes to make a mall in 60 days and he employs 30 men. After 30 days it is found that only one- third of the work is completed. How many extra men should he employ so that the work is completed on time?

20men

25men

30men

40men

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Explanation:

Let total work is w and it is given that one-third of the work is completed after 30 days. Means
M*D = 30*30 = w/3, so total work = 30*30*3
2700 = 30*30 + (30+p)*30, so we get P = 30 (p = additional men)

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