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A contructor undertakes to build a wall 1000 meter long in 50 days. He employed 56 men but at the end of 27 days he finds that only 448 meter of wall is

build. How many extra men must the contractor employ so that the wall is completed in time .



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Amount of wall left to build=1000-448=552 m
Days left=23
In each day,length of wall to be made=552/23=24 m

In 27 days,wall built previously by 56 men=448 m
In 1 day,wall built by 56 men=448/27 m
In 1 day,wall built by 1 man=448(27x56)
In 1 day,wall to be build by y men=(448xy)/(27x56)
or, y=81
So, total men=81
No. of extra men=25 more

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