There are 10 men spent 10 days finishing one project. If we need to finish the project by 5 days, how many more men do we need?

Question

A.1
B.5
C.10
D.15
E.20
Choice E is wrong, i'm starting to think that choice B is the answer.

Answer 1

"how many MORE men do we need?"

Answer 2

is the answer 10?

Answer 3

Yes.

Answer 4

choice c is correct.