Worker A takes 8 hours to do a job. Worker B takes 6 hours to do the same job. How long it take both A & B, working together but independently, to do the same job?
Choices
A) 20/9 B) 40/9 C) 50/9 D) 24/7 E) 80/9
one day work of A = 1/8   one day work of B = 1/6   so one day work of A and B together = 1/8 + 1/6 = 7/24   so total days required = 24/7   ANSWER:24/7
<result>D</result>
Worker A takes 8 hours to do a job. Worker B takes 6 hours to do the same job. How long it take both A & B, working together but independently, to do the same job?