To solve this problem, we’ll utilize the “time-speed-distance” relationship which is expressed by the formula d = rt, i.e., distance d is equal to speed r multiplied by time t.
The given information in this problem gives us: the speed of r = 60 mi/hr traveled over a distance of 1 mile. We need to find how much time, t, it took to travel a distance d of 1 mile at a speed r = 60 mi/hr, that is:
d/r = t or
t = d/r
Substituting the known values for d and r into the above equation, we have:
t = 1 mi./(60 mi/hr)
t = (1/60) hr.
t = (1/60) hr. (1)
t = (1/60) hr. (60 min./1 hr.)
t = (1/60)(60/1) min.
t = 1 minute ( or 60 seconds) to travel 1 mile at a speed of 60 miles per hour.