9
Answer: DSet 3: Ratios Rates Proportions (Intermediate)
Explanation
PROBLEM
Recent studies show that on a map, 1 inch represents 3 miles. If two cities are 4 inches apart on the map, how many miles apart are they?
On a map, 1 inch represents 3 miles. If two cities are 4 inches apart on the map, how many miles apart are they?
A.
11
B.
10
C.
24
D.✓ Correct
12
Detailed Explanation
[Variation 1] Choice D is the best answer. Distance = 4 inches times 3 miles/inch = 12 miles
Why others are wrong:
A: 11 is incorrect because it does not satisfy the equation.
B: 10 is incorrect because it does not satisfy the equation.
C: 24 is incorrect because it does not satisfy the equation.