Question

What’s the answer ?

Answer 1

The area of the rectangle in terms of length (l) is $l^{2}-7l$, if the width of the rectangle is 7 feet less than its length.

Step-by-step explanation:

The given is,

             Width of the rectangle is 7 feet less than its length

             Length is l

Step:1

           Formula for area of rectangle,

                      Area, $a = lb$

           Where,

                   l - Length of the rectangle

                  b - Width of the rectangle

Step:2

          From the given values,

                    w = $l$ - 7                      ( ∵ from given)

          The equation becomes  

                          =  $l$  × ( $l$-7 )

                          = $l^{2}$ - 7$l$

                Area, a =  $l^{2}$ - 7$l$ square feet

Result:

        The area of the rectangle in terms of length (l) is $l^{2}-7l$, if the width of the rectangle is 7 feet less than its length.