A building is 231 feet tall. For a class project, Jim has to make a scale model of the building to place in the front hall display case. The display case is 18 inches tall. Which scale will allow him to make the tallest model that will fit in the display case?

Question

anonymous · Answer

a 1 inch = 20 feet
b 1 inch = 15 feet
c 1 inch = 5 feet

mathstudent55 · Answer

Divide 231 by 20, 15, and 5, and see which one gives you an answer that is less than 18. In case more than one do, then use the one that gives you the larger number.

anonymous · Answer

i think its a

mathstudent55 · Answer

Compare a and b. You want the scale model to be as large as possible.

anonymous · Answer

so then a

mathstudent55 · Answer

If you divide 231 by 20 you get  a model that is ______ inches tall.
If you divide 231 by 15 you get a model that is _______ inches tall.
If you divide 231 by 5 you get a model that is _______ inches tall.
Which of the three makes the tallest model that is less than 18 inches tall??