Problema Solution
Tom can paint a wall in 20 minutes. Same can paint a wall in 22 minutes. If they work together, how long will it take them to paint a wall?
Answer provided by our tutors
let 'x' represent the time in minutes it takes to paint the wall together:
1/x = 1/20 + 1/22
solving for 'x' we have x=10.476
working together, they can pain the wall in approximately 10 1/2 minutes