SOLUTION: A specific park is rectangular-shaped and has a 3-mile perimeter. The length is 4 times the width. What are the dimensions of the park? Width: Length:

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Question 784049: A specific park is rectangular-shaped and has a 3-mile perimeter. The length is 4 times the width. What are the dimensions of the park?
Width:
Length:
Answer by MathLover1(20849) About Me  (Show Source):
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park is rectangular-shaped and has a 3mil perimeter:
P=3mil
The length L is 4 times the width W:
L=4W
since P=2%28L%2BW%29, substitute given values
3mil=2%284W%2BW%29.....solve for W
3mil%2F2=4W%2BW
3mil%2F2=5W
3mil%2F%282%2A5%29=W
3mil%2F10=W
W=0.3mil
now find L
L=4W
L=4%2A0.3mil
L=1.2mil
so,
Width: 0.3mil
Length:1.2mil

check: plug in P=2%28L%2BW%29
P=2%281.2mil%2B0.3mil%29
P=2%281.5mil%29
P=3mil