If 64 workers can finish a job in three hours, how many hours should it take for 48 workers to finish the same job?

A 2

B 5

C 4

D 2.5

Correct Answer: Option C

64 workers can finish a job in 3 hours 1 " " " " ' " 3 X 64 " 48 " " " " " ' 3 X 64/48 =4 hours