Asked by Hansel
A bus covered the 400-km distance between points A and B at a certain speed. On the way back the bus traveled at the same speed for 2 hours and then increased the speed by 10 km/hour until it reached A, thus spending 20 fewer minutes on the return trip. How long did the return trip take?
Answers
Answered by
Steve
from A to B at speed s took h hours.
s*h = 400
on the way back,
s*2 + (s+10)(h-2 - 1/3) = 400
h=5, so A to B took 5 hours.
so, ...
s*h = 400
on the way back,
s*2 + (s+10)(h-2 - 1/3) = 400
h=5, so A to B took 5 hours.
so, ...
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.