Answer:
Length = 45/4 inches
Width= 15/4 inches
Step-by-step explanation:
Perimeter= 30 inches
Let width = x
Length = 3x
Perimeter = 2l + 2w
30= 2(3x) + 2(x)
30 = 2(3x+x)
30/2 = 3x+x
15 = 4x
x= 15/4
Hence width is 15/4
Then the length must be 3x = 3(15/4)
THEREFORE, Length = 45/4 inches
Width= 15/4 inches
Hope this helps!
