The meaning of the area is the measurement of a surface in this case a rectangle, which can be find by using the formula A=lw where l represents the length and w represents the width.
In this exercise is given that a rectangle has a length of 20 inches and a with of 42 inches, and it is asked to find its area. In order to find the area of the rectangle, you have to substitute the given measures into the previous mention formula.
[tex]A=lw[/tex]
[tex]A=(20 in)(42 in)[/tex]
[tex]A=840in^{2} [/tex]
The area of the rectangle is 840 square inches.
