Working group
20 men complete one-third of a piece of work in 20 days. How many more men should be employed to finish the rest of the work in 25 more days?
Correct answer:
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Dr. Math
Let's break it down:
1/3 of the job takes 20 days
1(whole) job takes 20/(1/3) = 60 days
Amount of the job left = 2/3 or 40 days worth of work by the 20-men
20 men can finish the job in 60 days
1 man will finish it in 60 * 20 = 1200 days
Since, 1/3 of the work is completed and 2/3 rd of the work is left, so it will take one man 1200(2/3) = 800 days
Given: it needs to be completed it 25 days
800/25 = 32.
They will need to hire 32-20 = 12 more men.
1/3 of the job takes 20 days
1(whole) job takes 20/(1/3) = 60 days
Amount of the job left = 2/3 or 40 days worth of work by the 20-men
20 men can finish the job in 60 days
1 man will finish it in 60 * 20 = 1200 days
Since, 1/3 of the work is completed and 2/3 rd of the work is left, so it will take one man 1200(2/3) = 800 days
Given: it needs to be completed it 25 days
800/25 = 32.
They will need to hire 32-20 = 12 more men.
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