Question 498237
length = x
width = 1/2x + 1
2(x) + 2(1/2x + 1) = 40
This is the part I think you needed help with; setting up the equation.
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2x + x + 2 = 40
3x = 38
x = 12.7 meters = length
7.35 meters = width
2(12.7) + 2(6.35  + 1 ) = 40 meters.
25.4 + 12.7 + 2 = 40.1 (round off error)
Cleomenius.