An airplane is 180 feet

long. Blake makes a

scale model of the

airplane at 1:60 of its

actual size. How long is

the model?

Answer: 3 feet

Step-by-step explanation: First, since the model is scaled down from the airplane, we set the ratio as 1:60=x:180, or in fraction form 1/60=x/180. Solving for x, we find that x=3.