You can put this solution on YOUR website! 1 mile = 5280 feet
We know that time = distance/speed.
So we have time[in hrs] = 279.3 feet * 1 mile/5280 feet/(55 miles/hour).
Notice that all the distance units cancel and we are left with hours in the numerator.
So the answer is 0.0009618 hrs.
Let's convert this time into seconds:
0.0009618 hrs x 60 min/hr x 60 sec/min = 3.46 seconds.