Question

If 30 feet of a fencing material weighs 21 pounds, what does 75 feet of the same material weigh?

Answer 1

52.5 lbs

Explanation:

We can use a ratio to solve

30 ft 75 ft

-------------- = ------------

21 lbs x lbs

Using cross products

30x = 75*21

30x = 1575

Divide each side by 30

30x/30 =1575/30

x =52.5 lbs