<PRE><B>Question 468985</B>
Find the distance between R and M if they are 12CM apart on a map with a scale of 4CM :21Km
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Use a proportion of distance to cm measure.
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distance/12 cm = 21 km/4 cm
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distance = 12(21/4) = 3*21 = 63 km
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Cheers,
Stan H.</PRE>