90mi/hr= km/sec

I am trying to convert, and so far I have 90 mi/hr/1 =1.61/1=1/60 sec=144.9/60 * 1/60 = 2.44 km/sec

Which I know is wrong but trying to figure it out.
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1 Answer

90 mi/hr(1.6 km/mi) = 145km/hr

145km/hr/3600sec/hr = 0.04km/sec
by Level 6 User (23.1k points)

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