By mph, I assume you mean miles per hour, and not meters per hour.
We do know, 1 km = 0.6213 mile
Therefore,
420 km/h x (0.6213 mile/1km) = 260.9 miles per hour = 261 miles per hour (rounded off to 3s.f.)
460 kph = 285.8 mph
About 261 mph
200 MPH
27.96 mph
1 kilometre = 0.62137119 miles 270 x 0.62137119 = 167.7702213 270 kph = 168 mph (approximately)
kph x 0.621 = mph
360 kph = 223.7 mph
35 kph is 21.75 mph.35 kph = 21.75 mph
27.96 mph
50 mph is 31.07 kph.
46 kph = about 28.6 mph
1 kilometre = 0.62137119 miles 270 x 0.62137119 = 167.7702213 270 kph = 168 mph (approximately)
25 mph = about 40.233 kph
kph x 0.621 = mph
24 kph = about 15 mph. (14.9129086 mph)
360 kph = 223.7 mph
35 kph is 21.75 mph.35 kph = 21.75 mph
605.113 kph...
416.8 kph = 259 mph.
703 kph = 436.82 mph.