Q143
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 41/2 hours more to complete the job than they both working together. What time would they take to do the work together ?
A.
4 hours
B.
5 hours
C.
6 hours
AnswerD.
7 hours
Answer: Option C
Solution
Answer: Option C
Solution:
Let A and B together take x hours to complete the work.Then, A alone takes (x + 8) hours
And
B alone takes hours to complete the work
Then,