Question

If you need to construct a dog run for your dog and the total perimeter needs to be 40 feet, and you only have enough room to make it 5 feet wide, how long can you make the dog run?

Answer 1

Answer:15 ft

Step-by-step explanation:

Given

The total perimeter needed is $40\ ft$

The available width of the room is $w=5\ ft$

Suppose l is the length of the room

So, the perimeter of a rectangle-shaped room is $2(l+w)$

Putting values

$\Rightarrow 40=2(l+5)\\\Rightarrow l+5=20\\\Rightarrow l=15\ ft$