10 miles per hour is 16k per hour.
Simple maths - the formula is... K = S x T x 1.6 (K=Kilometres, S=Speed & T=Time)I'VE given you the formula - YOU do your homework !
575 km/h = 357.288 mph
One mile per hour is 1.609 km per hour. So, 40 km per hour is approximately 25 mph (exact answer is 24.86)
37.014912 km per hour