SOLUTION: two trains travel in opposite directions from the same station at rates differing by 20 kph. in two hours they will be 160 km apart
Algebra.Com
Question 558883: two trains travel in opposite directions from the same station at rates differing by 20 kph. in two hours they will be 160 km apart
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Train A speed =x
Train B speed = x+20
they are moving away
so add up speeds
combined speed = 2x+20
distance = 160
time = 2hours
t=d/r
2=160/(2x+20)
2(2x+20)=160
4x+40=160
4x=120
/4
x=30 mph
The speeds are 30 & 50 mph
RELATED QUESTIONS
Two trains start from the same station at the same time, but travel in opposite... (answered by ad_alta)
Two trains travel from Denver in opposite directions. One travels at 80kph, the other at... (answered by checkley79)
At 10:00 AM, two trains leave the station at the same time headed to opposite... (answered by ikleyn)
two trains started from the same place at the same time and traveled in opposite... (answered by oscargut)
Two trains leave Grand Central Station and travel in opposite directions. If the faster... (answered by nerdybill)
two trains start from the same station and run in opposite directions. one runs at a... (answered by checkley77)
Two trains start from the same station and run in opposite directions at an average rate... (answered by stanbon,sudhanshu_kmr)
Two trains start from the same station and run at an opposite directions at an average... (answered by mananth)
Two trains leave the same station at the same time and travel in opposite directions. One (answered by checkley77)