A contractor undertakes to built a walls in 50 days. He employs 50 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?



[ A ]    25
right
[ B ]    30
[ C ]    35
[ D ]    20
[ E ]    None of these
Answer : Option A
Explanation :