math help i really need

Question

Suppose you are making a model of a boat. The boat is 720 inches long. If you are using the scale 1 inch : 15 inch, find the length of the model

Answer 1

720/12 = 60 feet long boat. 60x12 inches = 720 inches

60/15 = 4 ft for the model 4 x 12 inches = 48 inches

720/15 = 48 inches = 4 feet

the model is 4 feet = 48 inches long