Hello!
There are three possible lengths.
We need to keep in mind that the total area cant exceed
, so, knowing that, we just need to find numbers that can be multiplied giving as result 60.
First combination:
![4ft(height)X15ft(width)=60 ft^(2)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/h29ybdh8dpg6ctlk2iy3chdk6wt01fqbui.png)
Second combination:
![5ft(height)X12ft(width)=60 ft^(2)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/dc1tc2w7u41s53v3nlnkpcl74xpxvxdgoy.png)
Third combination:
![6ft(height)X10ft(width)=60 ft^(2)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/72dchn2jldepp3e37bghw8i00rzciybao4.png)
Have a nice day!