A contractor undertakes to built a walls in 50 days. He employs 60 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?
Answers: A) 25 B) 90 C) 35 D) 20 E) None of these
60 men complete 0.4 work in 25 days.   Applying the work rule, m1 × d1 × w2 = m2 × d2 × w1   we have,   60 × 25 × 0.6 = m2 × 25 × 0.4   or m2 = 60×25×0.6/25×0.4 = 90 men   Answer90
<result>B</result>
A contractor undertakes to built a walls in 50 days. He employs 60 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?