Q. Two workers A and B are engaged to do a work. A working alone takes 8 hours more to complete the job than if both worked together. If B worked alone, he would need 4(1/2) hours more to complete the job than they both working together.What time would they take to do the work together?

1. 4 hours
2. 5 hours
3. 6 hours
4. 7 hours