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A

Lets length be l, width be b

Given: b=l-20
& Perimeter =120
2(l+b) = 120
or (l+b) = 60
or l + l -20 = 60
=> l =40; b =20
Area = l*b = 40*20 = 800
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SajjadAhmad
The width of a rectangular flower bed is 20 feet shorter than its length. If the perimeter of the flower bed is 120 feet, what is the area, in square feet, of the flower bed?

a) 800
b) 1,200
c) 1,800
d) 3,500
e) 3,600
Think a bit , let L = 40 and B = 20

So, P = 2 ( 40 + 20 ) => 120

Thus, Area will be 40*20 = 800 , Answer must be (A)
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