Question

Vida painted 3 rooms in 12 hours. Each room had 450 square feet of wall space that was painted. At what rate did Vida paint, in square feet per hour?

Answer 1

She painted at a rate of:
`112.5\,(ft^2)/(h)`

Explanation:

Notice that since Vida painted 3 rooms in the given time (12 hours), and each room had 450 square feet of painted wall, she painted a total of:

3 * 450 square feet = 1350 square feet = 1350
`ft^2`

Since she painted that number of square feet in 12 hours, the rate at which she painted was:

`rate=\,(number\,of\,ft^2)/(time) = (1350\,ft^2)/(12\,h) =112.5\, (ft^2)/(h)`