1.15 miles per hour is approximately to 1.85 kilometers per hour
There are further decimal places I do not care to type out and you likely do not care to know.
24 kph = about 15 mph. (14.9129086 mph)
15 mph = 24.1 km/h
100*1.6=160 kph
65*1.6=104 kph
90 kph = 55.92 mph
100 kilometers per hour (kph) is much faster.
27.96 mph
80kph
50 mph is 31.07 kph.
46 kph = about 28.6 mph
80/1.6=50 MPH
512/1.6=320 MPH