Answer:
5 by 10
Step-by-step explanation:
We know that the equation of a perimeter of a recangle is 2(l)+2(w), l being length and w being width. We know that l=2w. So the perimeter of this room would be:
2(2w)+2(w)=30
4w+2w=30
6w=30
w=5
l=2w
l=10
the dimensions are 5 by ten
