SOLUTION: the lenght of a rectangle is fixed at 20 cm. what widths will make the perimeter greater than 86 cm? the width must be greater than ? cm

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Question 186445: the lenght of a rectangle is fixed at 20 cm. what widths will make the perimeter greater than 86 cm?
the width must be greater than ? cm
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!

*Remember: P%5BR%5D=2L%2B2W
86=2%2820%29%2B2W
86=40%2B2W
cross%282%29W%2Fcross%282%29=%2886-40%29%2F2=46%2F2
highlight%28W=23cm%29-----> Therefore, the Width should EXCEED this length for the Perimeter be greater than 86 cm.
We'll check 24cm for Width?
86=2%2820%29%2B2%2824%29
86=40%2B48
86cm=88cm, Correct! It is greater than 86cm being the Width greater than 23cm.
Thank you,
Jojo