The proper way to change units:
speed= (40m/s)(1km/1000m)(1mile/1609m)(3600s/hr)
do that , now check yourself. In google search window, type this:
40 m/s in miles/hour
My advice to you is to slow down.
I am driving to Atlanta on the I-85 in my G35 Coupe at 40.0 m/s and I pass a cop. Will I get a ticket? The speed limit is 70.0 mi/h, 1 mile= 1.609 km = 1609 m.
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