Question

A can do a piece of work in 8 h while B
alone can do it in 12 h. Both A and B
working together can finish the work
in :

Answer 1

Step-by-step explanation:

12-8=4 hope it helps u. I m not sure it is right

Answer 2

Answer:

4.8 hours or 25/5

Step-by-step explanation:

LCM of 8 and 12 is 24.

A can complete 1/8th of the task in one hour or 3/24th.

B can complete 1/12th of the task in one hour or 2/24th.

A and B together can do (3/24)+(2/24) or 5/24th of the task in one hour. Both working together will complete the task in 24/5 or 4.8 hours.