Mathematics-Numbers-MyTest-03

The question below represents which competency?

If it takes Chelsey 3 hours to wash a car, and it takes Sammie 2 hours to wash that same car, how long would it take to wash the car if they worked together?

• 5 hours 0 minutes
• 2 hours 20 minutes
• 1 hour 20 minutes
• 1 hour 12 minutes