Question

A hallway measuring 90 feet x 7 feet requires 1/2 a fluid ounce of cleaning solution per square foot. How much cleaning solution is required to clean the hallway?

Answer 1

`90*7 = 630ft ^(2) \\ \\ 1/2 floz ->1 ft^(2) \\ \\ 630/2=315 \\\\\boxed{315}`

Answer 2

First, find the area of the hallway.


`Area=length*width`


`A=90*7`


`A=630`

Now you know there are 630 square feet to be cleaned. To find the amount of cleaning solution needed, multiply this number by 1/2.


`Solution=area* (1)/(2)`


`S=630* (1)/(2)`


`S= (630)/(2)`


`S=315`

Answer: 315 fluid ounces