Answer:
22.5
Explanation:
2 in.=15 this is the scale as a ratio
1 in.=7.5 by dividing by 2 you can find what one inch would represent int he scale model
3 in.=22.5 by multiplying by 3 you find how many 3 inches in the scale model represents.
since the scale is 15 feet for every 2 inches and the scale model length is 3:
3/2 = 1.5
multiply 1.5 to 15 feet: 22.5
answer is 22.5
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