SOLUTION: the width of an rectangle is fixed at 10 cm. what lengths will make the perimiter greater than 100cm?

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Question 147901: the width of an rectangle is fixed at 10 cm. what lengths will make the perimiter greater than 100cm?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The perimeter of a rectangle is twice the length plus twice the width.
Mathematically,
P=2L%2B2W
You want to set up an inequality,
P%3E100
2L%2B2W%3E100
In your case, the width is 10.
2L%2B20%3E100
2L%3E80
L%3E40
Any length greater than 40 cm will make the perimeter over 100 cm.