If 0.5 Y people work on project B for 10 days and then 0.5Y people join the project after 10 days. How many days will it take to complete the Project B?

If 0.5 Y people work on project B for 10 days and then 0.5Y people joi

1.	If 0.5 Y people work on project B for 10 days and then 0.5Y people join the project after 10 days. How many days will it take to complete the Project B?
A.	35 days
B.	40 days
C.	45 days
D.	50 days
E.	None of these
Answer» C. 45 days