Mr. X has to build a wall 1000 meters long in 50 days. He employs 56 men but at the end of 27 days finds that only 448 meters are built. How many more men must be employed so that the work may be finished in time?

a)58
b)81
c)38
d)25

• 448/56=8, per day work=27/8, 552mt of wall built in 24 days= 24*27/8=81, no of men=81-56=25
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