Number of men employed in the beginning = 56
Length of wall = 1000 m No. of days = 50
In the time of 27 days, only 448 m of wall was completed
Remaining period = 50 – 27 = 23 days
and length of wall to be completed = 1000 – 448 = 552
Now in 27 days, 448 m long wall was completed by = 1000 m
in 1 day, 448 m long was completed by = 56 x 27
inf 1 day, 1 m long wall will be completed by
= (56 × 27)/448 m
And in 23 days 552 m long wall be completed
by = (56 × 27 × 552)/(448 × 23) men
= (1 × 27 × 24)/8 = 81 men
∴ No. of extra men required
= 81 – 56 = 25 men