To answer this question, you could dad a couple things.
One of them is to set up a proportion with you original scale and then solve for the width.
1/3 inch:2 ft = 5 inches:x feet
Use cross multiplication to get: 2 x 5 = 1/3x 10 = 1/3x; divide both sides by 1/3
x = 30 feet
Another way to do this would be to figure out how many groups of 1/3 there are in 5 inches or 5÷1/3. This answer is 15. This means it would be 15 groups of 2 feet or 30 feet.
