On a map, 3 inches corresponds to 100 miles. Find the actual distance between two cities that are 7 1/2 inches apart on the map.

Question

Mathematics

Jethro

17 January, 04:27

On a map, 3 inches corresponds to 100 miles. Find the actual distance between two cities that are 7 1/2 inches apart on the map.

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Answers (1)

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Ronnie Rose · Answer 1

Check by using law of ratios and proportions:

3 is to 100 = 7.5 is to x

Rule: The product of the means equals the product of the extremes.

3•x = 7.5• (100)

3x = 750

x = 750 : 3

x = 250