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Answer:
length=35
Step-by-step explanation:
Area of the rectangle: A=l*w
A=L*w
350=L*w
350/L=w
Perimeter of a rectangle: P=2L+2W
P=2L+2W
Substitute 350/L=W
P=2L+2W
90=2L+2(350/L)
90=2L+700/L
add 2L to 700/L
90=(2L²+700)/L
90L=2L²+700
transpose 90L to the right side leaving 0 on the left side
0=2L²-90L+700
Factor 2l²-90l+700
0=(L-10)(L-35)
L=10 ; L=35
Length is L=35 meter because length must be longer than the width.