Answer:
Length = 10 inches
width = 25 inches
Explanation:
Let the length of the rectangle be X inches
width = (3x - 5) inches
Perimeter of rectangle = 70 inches
2 * ( l + b) = 70
2 * ( x + 3x - 5) = 70
4x - 5 = 70 / 2
4x - 5 = 35
4x = 35 + 5
4x = 40
x = 40/4
x = 10
Length = 10 inches
width = 3x - 5 = 3*10 - 5 = 30- 5 = 25 inches