SOLUTION: A train travels at 40 mph for the first part of a 975 mile trip. After a while, it increases its speed to 45 mph. The trip took 30 hours in total. For how many hours did the train

Question 470369: A train travels at 40 mph for the first part of a 975 mile trip. After a while, it increases its speed to 45 mph. The trip took 30 hours in total. For how many hours did the train travel at 45 mph?
Found 2 solutions by sofiyac, Alan3354:
Answer by sofiyac(983) (Show Source): You can put this solution on YOUR website!
Please make sure it's copied correctly, i seem to get answers that aren't possible. Repost again please.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
975/30 = 32.5 mph average for the trip
There's no way to average 32.5 when moving at 40 or 45 mph

RELATED QUESTIONS
During the first part of a trip, a canoeist travels 45 miles at a certain speed. The... (answered by ankor@dixie-net.com)
A train travels from Beauford to Fallsville at a speed of 88 mph and then travels back to (answered by Alan3354)
A train travels from Beauford to Fallsville at a speed of 88 mph and then travels back to (answered by Alan3354)
During the first part of a trip a canoeist travels 45 miles at a certain speed. The... (answered by mananth)
A truck driver traveled at 40 mph for the first part of a 646-mile trip, then increased... (answered by Stitch)
A truck driver traveled at 40 mph for the first part of a 646-mile trip, then increased... (answered by ankor@dixie-net.com)
A bus took a 700 mile trip in 12 hours. The speed was 75 mph for the first part of the... (answered by ankor@dixie-net.com)
A bus took a 330 mile trip in 7 hours. The speed was 54 mph for the first part of the... (answered by stanbon)
A bus took a 330 mile trip in 7 hours. The speed was 54 mph for the first part of the... (answered by lynnlo)