Question

A particular train is 14 ft tall. A model of it was built with the 3 in : 2ft. How tall is the model

Answer 1

For the model, every 2 feet would equal 3 inches or every foot would equal 1.5 inches.
You can divide to see how many 2 feet are in 14 feet.
$14 \div 2 = 7$
Since there are 7, you can multiply by 3 to see how many inches the model is.
$7 \times 3 = 21$
The train model is 21 inches tall.