Question 754822
Tina can paint a fence in 8 hours.
so Tina can paint 1/8 parts in 1 hr
Tom can paint the same fence in 4 hours.
so Tom can paint 1/4 parts in 1 hr
so both can paint 1/8+1/4=3/8 parts in 1 hr
so the total time taken by both to paint the fence=8/3hrs