The width and length of a rectangle (in feet)are consecutive odd integers. If the length is increased by 5 feet, the area of the resulting rectangle is 60 square feet. What is the area of the original rectangle?

25 ft2
30 ft2
35 ft2

Question

The width and length of a rectangle (in feet)are consecutive odd integers. If the length is increased by 5 feet, the area of the resulting rectangle is 60 square feet. What is the area of the original rectangle?



25 ft2
30 ft2
35 ft2

anonymous · Answer

original area is $n(n+2)$ 
new area is $n(n+7)=60$

anonymous · Answer

this tells you $n=5$ and so the original area is $5\times 7=35$