SOLUTION: the length of a rectangle is three times its width theperimeter of the rectangle is56 cm a find the length and width of the rectangle b find the area of the rectangle. how

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Question 144127: the length of a rectangle is three times its width
theperimeter of the rectangle is56 cm
a find the length and width of the rectangle
b find the area of the rectangle.
how do i do this please
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!
P=2L+%2B+2W and in this case L=3W, so solve:

2%283W%29%2B2W=56. Substitute the result for W into L=3W. That will answer part a.

Multiply the two dimensions found in part a to calculate the area for part b.