Question 1035939
A train traveling at 60 m.p.h,Arrives at a station 100 miles away 15 min later than schedule
 At what speed should it travel to arrive exactly on time?
Find the actual time of the train
{{{100/60}}} = 1{{{2/3}}}
change 15 min to {{{1/4}}} 
1{{{2/3}}} - {{{1/4}}} = 1.4167 hr is the desired time 
Let s = the desired speed
{{{100/s}}} = 1.4167
s = {{{100/1.4167}}}
s = 70.6 mph