cooloneih
cooloneih cooloneih
  • 23-01-2017
  • Mathematics
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Vimal1
Vimal1 Vimal1
  • 23-01-2017
Perimeter = lenght×2 + width×2
Let x represent the width
80 = 2(2x - 5) + 2x
Find for x
80 = -10 + 4x + 2x
80 + 10 = 6x
90 = 6x
90/6 = x
x = 15

The width is 15 cm
The length is 2×15 - 5 = 25
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