A rectangle 12

A rectangle has a width of 7.2 cm shorter than its length. The perimeter of this rectangle is 22.8 cm. Write the width-to-length ratio of this rectangle in the simplest form and show how you solve the problem.

Correct answer:

r =  7:31

Step-by-step explanation:

w=l7.2 22.8=2w+2l  w=l7.2 22.8=2 w+2 l  lw=7.2 2l+2w=22.8  Pivot:Row1Row2 2l+2w=22.8 lw=7.2  Row221 Row1Row2 2l+2w=22.8 2w=4.2  w=24.2=2.1 l=222.82w=222.82 2.1=9.3  l=1093=9.3 w=1021=2.1  r=w:l=2.1:9.3=7:310.2258=7:31

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