Respuesta :
Make use of the identities 1 mile = 1609 m and 1 hr = 3600 sec.
Then:
0.63 mi 1609 m 1 hour
---------------- * ------------------ * --------------- = 0.28 m/sec
1 hr 1 mile 3600 sec
Another way in which to do this problem follows: Use 60 mph = 88 ft/sec
Then
0.63 mi 88 ft/sec 1 meter
------------ * ---------------- * -------------- = 0.28 m/sec
1 hr 60 mph 3.281 ft