You can put this solution on YOUR website! If you are in a car traveling 30 miles per hour, how long does it take to go 100 feet?
change mph to "feet per hour":
30 mph * 5280 feet/mile = 158400 feet per hour
.
d = rt
d/r = t
100/158400 = t
.00063 hours = t
.
in terms of seconds:
.00063 * 60min/hr * 60 sec/min
2.3 seconds