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Two ships leave from station a and station B at the same time. A travels x kilometers per hour, B 40 kilometers per hour. T when they were young, they met Express the distance between station a and station B with a formula containing letters
（X+40）×t
Two ships leave from station a and station B at the same time. Ship a travels x kilometers per hour, and ship B 40 kilometers per hour. After t hours, the two ships meet
Express the distance between station a and station B with a formula containing letters
The speed of ship a is: X km / h
The speed of ship B is 40km / h
Therefore: the distance between station a and station B = the running distance of ship a after t hour + the running distance of ship B after t hour
That is: T * x + 40tkm
The two ships, a and B, are facing each other from a and B. when a leaves the post for 700 kilometers, they meet with B. after meeting, the two ships will arrive
Go on and return immediately after arriving at the other party's starting point. When ship a is 400 kilometers away from B, it will meet ship B for the second time. How many kilometers is the distance between a and B?
The distance between the two places is x km
A speed / b speed = a first driving distance / B first driving distance = a second driving distance / B second driving distance
700/(x-700)=(x+400)/(2x-400)
700*(2x-400)=(x-700)*(x+400)
1400x-280000=x^2-300x-280000
x^2-300x-1400x=0
x=1700
The distance between the two places is 1700km
A and B ships set out from the same dock in opposite directions at the same time. A ship travels 23.5 kilometers per hour, B ship travels 21.5 kilometers per hour. After a few hours, the distance between the two ships is 360 kilometers?
360 △ 23.5 + 21.5, = 360 △ 45, = 8 hours; a: after 8 hours, the two ships are 360 km apart
RELATED INFORMATIONS
- 1. Ships a and B face each other from two points a and B respectively. When ship a leaves the port for 700 km, they meet ship B. after meeting, the two ships continue to move forward and return to each other's starting point immediately. When ship a is 400 km away from B, they meet ship B for the second time. How many km is the distance between two points a and B?
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