Question

A 189 square foot rectangular office has a length of 21 feet. What is the width of the office?

Answer 1

We have formual for area of rectangle A=l*w where l is length and w is width. We can transform it to obtain width
A=l*w /:l (divide both sides by l)

`(A)/(l)=w`
Knowing that A=189 and l=21 we can substitute our data to the formula
w=
`(189)/(21)= 9` - its the result