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31 March, 17:36

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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  1. 31 March, 18:05
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    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
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