John, Rick, and Molli paint a room together.
What is the hourly rate for John? What is the hourly rate for Rick? Refer
to the amount of time you determined in which John and Rick can paint
the room alone. Use rooms per hour as the unit for your rates.
To determine the hourly rates for John and Rick, we first need to determine how long it takes each of them to paint the room alone.
Let's say John can paint the room alone in 5 hours, and Rick can paint the room alone in 4 hours.
This means that together, John and Rick can paint the room in 1 / (1/5 + 1/4) = 20/9 hours.
Therefore, the hourly rate for John would be 1 room / 5 hours = 0.2 rooms per hour.
And the hourly rate for Rick would be 1 room / 4 hours = 0.25 rooms per hour.