SOLUTION: Please help me how to solve this problem. The width of a rectangle is fixed at 20 cm and the perimeter can be no greater than 100 cm. Find the maximum length of the rectangle.

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Question 1051086: Please help me how to solve this problem.
The width of a rectangle is fixed at 20 cm and the perimeter can be no greater than 100 cm. Find the maximum length of the rectangle.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The perimeter of a rectangle is,
P=2L%2B2W
P%3C=100
Substituting,
2L%2B2W%3C=100
L%2BW%3C=50
L%2B20%3C=50
highlight%28L%3C=30%29
So the maximum length is 30 cm.