Question

angelo takes 3 hours to paint a wall alone. harold paints the same wall alone in 4 hours, while jane takes 5 hours. theoretically, how long would it take the three friends working together to paint one wall?

Answer 1

Total Time = 1 / (1/3) + (1/4) + (1/5)

Total Time = 1 / (.33333) + (.25) + (.2)

Total Time = 1 / .78333

Total Time = 1.276601177 Hours

Total time = 1 hour and 16.596 minutes

Explanation: