Question 266449: The width of a retangle is fixed at 15cm. What lengths will make the perimeter greater than 86cm? Answer by drk(1908) (Show Source):
You can put this solution on YOUR website! The perimeter formula is
P = 2L + 2W
we know that we = 15, so we get
P = 2L + 30.
Now we want perimeter > 86, so we have
86 < 2L + 30
subtracting, we get
56 < 2L
dividing, we get
28 < L
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