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A plane is travelling at 510 mph (miles per hour). To the nearest whole number, the speedometer reading in kilometers per hour is ____.

 Jul 5, 2020
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The approximate conversion from miles to kilometers is 1.609. Multiply 150 by 1.609 to get 241.35, which rounds to the nearest whole number 241. Therefore the speedometer reads 241 km/h.

 Jul 5, 2020

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