Answer:
13.7
Step-by-step explanation:
Pythagorean theorem converse
<span>6 3/8 = 51/8 = 6.375
11 3/8 = 91/8 = 11.375
13 5/8 = 109/8 = 13.625</span>
Let us assume the width of the rectangle = x
Then Length of the rectangle = 4x + 9.7
Perimeter of the rectangle = 91.4 cm
Then
91.4 = 2[x + 4x + 9.7]
91.4 = 2[5x + 9.7]
91.4 = 10x + 19.4
91.4 - 19.4 = 10x
10x = 72
x = 7.2
So
Width of the rectangle = 7.2 cm
Length of the rectangle = 4x + 9.7
= 28.8 + 9.7
= 38.5 cm