<PRE><B>Question 87892</B>
Let x be the width of the Rectangular range of the missile.
then, the length will be 5x - 65

Perimeter = 2*(length +width)
          = 2*( x + 5x - 65)
          = 2*(6x - 65)

Given, perimeter = 800
so, 2*(6x - 65) = 800
12x - 130 = 800
 Add 130 on both sides

12x = 930

divide by 12

x = 77.5

width = 77.5
length = 5*77.5 -65 = 322.5


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