25 mph = 40.2 km/h
The formula to arrive at the answer
25 mi*
63360 in
1 mi
*
2.54 cm
1 in
*
1 km
100000 cm
=
40.2336 km
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32 mph = 51.499 kilometres per hour.
To convert from miles per hour to kilometres per hour, multiply by 1.609344. Therefore, 71 miles per hour is equal to 71 x 1.609344 = 114.263424 kilometres per hour.
To convert miles per hour to kilometres per hour, multiply by 1.609344. Therefore, 187 miles per hour is equal to 187 x 1.609344 = 300.947328 kilometres per hour.
There are 1.609344 kilometres in one mile. Therefore, 500 miles per hour is equal to 500 x 1.609344 = 804.672 kilometres per hour.
There are 1.609344 kilometres in one mile. Therefore, 211 miles per hour is equal to 211 x 1.609344 = 339.571584 kilometres per hour.