Question

A cable 80 feet long weighs 100 pounds. How much will 120 feet of this cable​ weigh?

Answer 1

Let's set up a proportion to solve this problem:

80 feet is to 100 pounds as 120 feet is to x pounds

(80/100) = (120/x)

Cross multiply:

80x = 12000

Divide by 80:

x = 150 pounds

Therefore, 120 feet of this cable will weigh 150 pounds.