Answer:
width=2 11\16
length= 3 13\16
Step-by-step explanation:
the width is unknown lets name it x
width=x
length=x±9\8
2[x±x±9\8]=13 1\4 cm
x± x =2x
2x×2=4x
9\8×2=9\4
4x±9\4=13 1\4
4x=13 1\4 -9\4
52\4-9\4=43\4
4x=43\4
43\4÷4=2 11\16
so x which is width =2 11\16
length 2 11\16 ±9\8=3 13\16
