SOLUTION: Two bicyclists are seven-eighths of the way through a one-km-long tunnel when a train approaches the closer end at 40 km/h. The riders take off at the same speed in opposite direc

Question 717919: Two bicyclists are seven-eighths of the way through a one-km-long tunnel when a train approaches the closer end at 40 km/h. The riders take off at the same speed in opposite directions, and each escapes the tunnel as the train passes them. How fast did they ride?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Two bicyclists are seven-eighths of the way through a one-km-long tunnel when a train approaches the closer end at 40 km/h. The riders take off at the same speed in opposite directions, and each escapes the tunnel as the train passes them. How fast did they ride?
**
Speed=distance/travel time
Distance bicyclists had to cover=(7/8) km
Their travel time had to be≥travel time of the train
travel time of the train=1km/(40km/hr)=(1/40) hr
speed of bicyclists=(7/8)km/(1/40)hr=35km/hr
How fast did they ride? 35 km/hr
RELATED QUESTIONS
Hi, this problem's been bugging me for a few days now... Thanks for the help! Two... (answered by Boreal,ikleyn,MathTherapy)

An eastbound bicyclist enters a tunnel at the same time a westbound bicyclist enters the... (answered by stanbon)

a550 yard long train travelling at 40 mph, enters a three mile long tunnel. How long will (answered by ankor@dixie-net.com)

Two railroad workers were working together in a 1.2 Km mountain tunnel when a signal... (answered by ankor@dixie-net.com)

Santa decided to use his train to deliver gifts this year. His 220 yard long train,... (answered by TimothyLamb)

a train traveling at 60 mph enters a tunnel that is 5 miles long. the train is one mile... (answered by JBarnum)

a train one mile long travels at 30 mph. it enters a tunnel one mile long at 4 pm. at... (answered by josmiceli)

A trackwalker was walking through a tunnel when he heard the train was coming. Looking at (answered by richwmiller)

Ferdbert is taking a leisurely stroll through a train tunnel when he hears the whistle of (answered by KMST)