Question

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 84 square feet. What is this amount

Answer 1

84 = 7 * 12, so we can get an area of 84 square feet by adding two feet to the width and the length.

Answer 2

Let, the equal amout is x
Therefore, 2{(5+x)+(10+x)}=84
2(15+2x)=84
4x=84-30
x=54/4
x=13.5

Answer 3

\[(x+10) \{x+5\}=84 \]x = 2