Question 1117273
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<pre>
50 men working 8 hours per day 20 working days, spent  50*8*20 = 8000 men-hours.


Let n be the number of men to employ additionally.


Then the team will count (50+n) workers, that are to complete the remaining 1800 m working 10 hours per day during remaining 10 days.


The equation for the constant rate of work is


{{{1200/8000}}} = {{{1800/((50+n)*10*10)}}}.


From this proportion,   50+n = {{{(1800*8000)/(1200*10*10)}}} = 120.


Hence,  120 - 50 = 70 workers should be employed additionally to complete the work under given conditions.
</pre>

Solved.


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