Homework Help: math

Posted by Anonymous on Tuesday, July 12, 2011 at 10:04pm.

A map has a scale of 5cm=20km. If two cities are 17 centimeters apart on the map what is the actual distance between the two cities to the nearest tenth of a kilometer

math - TutorCat, Tuesday, July 12, 2011 at 10:07pm
5cm/20km = 17cm/x km

cross multiply:
5x = (20)(17)

solve for x.
math - Ms. Sue, Tuesday, July 12, 2011 at 10:07pm
Use this proportion. Cross multiply and solve for x.

5/20 = 17/x

5x = 340
x = 68.0

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