Question 211690
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A rectangle has an area of 240 in(squared), and one side has length x. 
Express the perimeter of the rectangle as a function of x.
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        Calculations in the post by @HyperBrain are Hyper-incorrect.

        I came to bring a correct solution.



Given the sides of the rectangle x and y, the area A=xy.


Given A=240


So,

xy = 240

y = 240/x


Then, the perimeter is given by P=2x+2y


So,


P = {{{2x}}} + {{{2(240/x)}}}


P = {{{2x}}} + {{{480/x}}}.   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>ANSWER</U>


Solved correctly.