selenasarahi selenasarahi
  • 18-05-2015
  • Mathematics
Answered

The length of a rectangle is six times its width.
If the area of the rectangle is 600yd^2, find its perimeter.



Answer :

darth666
darth666 darth666
  • 18-05-2015
rectangle area = a*b
perimeter = 2(a+b)

a - lenght
b - width

a = 6b

a*b=600
6b*b=600
[tex]6b^2=600[/tex]
[tex]b^2=100[/tex]
[tex]b=\sqrt{100}[/tex]
b=10
a = 6*10 = 60
Perimeter = 2(a+b)=2(60+10)=2*70=140 yd


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