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2015-11-06T06:45:48+05:30

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Speed is 42 miles per hour

1mile per hour = 1.46667 foot per second
42mph = 42×1.46667 fps = 61.6 fps

So the speed of fox in feet per second is 61.6 fps
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2015-11-12T15:35:50+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
1 miles  = 1760 yards = 3 * 1760 feet    ( also equal to 1600 meters approximately)
1 hour = 3600 sec

speed = 42 miles/hr = 42 * 3 * 1760 feet / 3600 sec
           = 61.6 ft/sec

another way to do conversion from  mi/hr to ft/s   is by multiplying with 1760/1200 = 1.467
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