Problema Solution
The width of a rectangle is 6 kilometers less than twice its length. If its are is 216 square kilometers, find the dimensions of the rectangle.
Answer provided by our tutors
Let
Length = x km
Width = 2x - 6 km
A = 216 Km^2
A = Length*Width
x(2x - 6) = 216
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click here to see the equation solved for x
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x = 12 km
We need to ignore the negative solution -9 since the length can not be negative.
2x - 6 = 2*12 - 6 = 24 - 6 = 18 km
The dimensions of the rectangle are 12 km and 18 km.