SOLUTION: Please help me answer: Width of a rectangle is fixed at 10cm. What lenths will amke the perimeter greater than 78cm.

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Question 212392: Please help me answer: Width of a rectangle is fixed at 10cm. What lenths will amke the perimeter greater than 78cm.
Found 2 solutions by edjones, solver91311:
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
Let L=length
2L+2w=P
2L+20>78
2L>58
L>29 cm
.
Ed

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!

The perimeter of a rectangle is given by:



If the width is fixed at 10 cm, and the perimeter must be greater than 78 cm, then you can substitute thus:




Just solve the inequality for



John