A truck is traveling at a speed of 45 mph. What is its speed in SI units? 40 m/s 72 m/h 72 km/h 20 m/s Hide hint for Question 3 1.0 km = 0.621 mi
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1 mile is equal to 1.609 kilometers. So, to convert miles per hour to kilometers per hour, we multiply the speed in miles per hour by 1.609. 45 mph * 1.609 = 72.405 km/h Show more…
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