Question

A contractor undertook to complete a piece of work in 120 Days and employed 140 men upon it. At the end of 66 days only half of the work was done,so he put on 25 extra men. By how much time did he exceed the specific time ?

Answer 1

Answer:

Step-by-step explanation:

Here 140 employes took 66 days to complete half of the work .Hence he employed another 25 members to complete remaining half work in remaining 'x' days.

(140*66)/(w/2) = [(140+25)*x]/(w/2)

from this we get x=56 days.Hence it took total of 56+66=122 days to complete the work .

Hence it took extra 2 days to complete the work

Answer 2

Answer: A) 2 days

Explanation:

work done=total number of person x number of days;

half of work done = 140 x 66;

For half of remaining work 25 extra men are added.

Therefore, total men for half work remaining = 140 + 25 = 165;

Let 2nd half work will be completed in K days;

140 x 66 = 165 x K

K = 122;

Hence, extra days => 122-120 = 2days