CK-12_Algebra_1_Second_Edition_Volume_1 by CK-12 Foundation

Author:CK-12 Foundation
Language: eng
Format: epub
Publisher: CK-12 Foundation

Solution

The scale is the ratio of distance on the map to the corresponding distance in real life. Written as a fraction, it is . We can also write an equivalent ratio for the distance Anne measures on the map and the distance in real life that she is trying to find: . Setting these two ratios equal gives us our proportion: . Then we can cross multiply to get .

That’s how many centimeters it is from Fleet Street to Borough Road; now we need to convert to kilometers. There are 100000 cm in a km, so we have to divide our answer by 100000.

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