Question 1040624
I am assuming the riders did 7/8 of a mile in the same time that the train did a mile.
A train at 40 mph does a mile in 90 seconds.
The riders do 7/8 mile in 90 seconds.
in 40 times 90 seconds (3600 seconds), the riders have ridden for an hour.
40 * (7/8)=35 mph.