A contractor undertakes to built a walls in 50 days. He employs 40 peoples for the same. However after 25 days he finds that only 40% of the work is complete. How many more man need to be employed to complete the work in time?  Choose the correct option.
A) 60
B) 30
C) 35
D) 20
E) None of these
40 men complete 0.4 work in 25 days.   60pplying the work rule, m1 × d1 × w2 = m2 × d2 × w1   we have,   40 × 25 × 0.6 = m2 × 25 × 0.4   or m2 = 40×25×0.6/25×0.4 = 60 men   60nswer60
<result>A</result>
A contractor undertakes to built a walls in 50 days. He employs 40 peoples for the same. However after 25 days he finds that only 40% of the work is complete. How many more man need to be employed to complete the work in time?