A rectangular garden has a width of 5 feet and a length of 10 feet. If an equal amount is added to both the width and the length, the area is increased to 104 square feet. What is this amount?
1 Answer
May 6, 2017
The amount of increase is
Explanation:
Let us consider the amount of increase of width and length as
Since the formula for area of a rectangle is:
with the given data we can write (reversing the equation to
Subtract
Factorise.
Since the increase must be a positive integer, the amount of increase is
We check this by calculating the area: