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The length of a rectangle is 4 ft longer than its width. If the perimeter of the rectangle is 48 ft , find its area.

Respuesta :

ghanami
hello : 
x : width.  and y the length
y=x+4...(1)
2(x+y) =45....(2).............2(x+y) is the perimeter
subsct in (2) : 
2(x+x+4) =48
2(2x+4)= 48
4x+8 = 48
4x=40
x= 10
y = 10+4 = 14 
the area is : 14×10 = 140  ft²

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