Question

What is the length of the rectangle ?

Answer 1

`\large\boxed{Length=4y^2\ meters}`

Explanation:

The formula of an area of a rectangle:

`A=wl`

w - width

l - length

We have

`w=3y^3,\ A=12y^5`

Substitute:

`(3y^3)(l)=12y^5` divide both sides by 3y³

`l=(12y^5)/(3y^3)` use
`(a^n)/(a^m)=a^(n-m)`

`l=4y^(5-3)\\\\l=4y^2`