A contractor undertook a project to complete it, in 20 days which needed 5 workers to work continuously for all the days estimated. But before the start of the work the client wanted to complete it earlier than the scheduled time, so the contractor calculated that he needed to increase 5 additional men every 2 days to complete the work in the time the client wanted it:
How many men were working on the day the project was completed as per the date of client wanted to complete it?

Options

A. 5
B. 10
C. 20
D. none of these

Answer

C