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A circular microchip with a radius of 2 centimeters is manuf

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A circular microchip with a radius of 2 centimeters is manuf [#permalink] New post 26 Aug 2017, 02:26
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A circular microchip with a radius of 2 centimeters is manufactured following a blueprint scaled such that a measurement of 1 centimeter on the blueprint corresponds to a measurement of 0.8 millimeters on the microchip. What is the diameter of the blueprint representation of the microchip, in centimeters? (1 centimeter = 10 millimeters)

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[Reveal] Spoiler: OA
50 centimeters

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Re: A circular microchip with a radius of 2 centimeters is manuf [#permalink] New post 25 Sep 2017, 05:05
If the each centimeter on the blueprint is 0.8 millimeters in reality, this means that the real radius of 2cm is 25cm long on the blueprint. This comes from the proportion that 1:0.08=X:2, where X is the length of the radius on the blueprint and 0.08 is 0.8mm in centimeters (divide by 10). Then, X = 2/0.08 = 25cm. Then, the diameter is the radius multiply by 2, 50cm.
Re: A circular microchip with a radius of 2 centimeters is manuf   [#permalink] 25 Sep 2017, 05:05
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A circular microchip with a radius of 2 centimeters is manuf

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