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A fence is shown on a blueprint and has a sides of leg the 17cm,18cm,18cm and 19cm.If themail scale on the blueprintis2cm:7cm,what is the total length of the fence?please tell me how did you get it.
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Apr 27, 2017
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A fence is shown on a blueprint and has a sides of leg the 17cm,18cm,18cm and 19cm.If themail scale on the blueprintis2cm:7cm,what is the total length of the fence?please tell me how did you get it.
Mathematics
middle-school
Luca Martinetti
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Luca Martinetti
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The answer is 252 cm. You divide each number by two and then multiply what ever that is by 7. ( since the ratio is 2:7)
MaxC
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Apr 29, 2017
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MaxC
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ok so 2cm on the blueprint is actually 7cm in real life
2:7=1:3.5
for every cm on the map, it is 3.5 times that in real life
so total legnths
17 times 3.5+18 times 3.5+18 times 3.5+19 times 3.5=
59.5+63+63+66.5=
252
answer is 252cm
Milan Majer
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May 3, 2017
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Milan Majer
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