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A. There is a highway between B and B. A and B start from ab at the same time. The speed of a is 50 km A. There is a highway between B and A. A and B start from ab at the same time. The speed of a is 50 km / h. After one hour, the two vehicles meet for the first time. Then the two vehicles continue to drive and return to B and a. the distance between the second meeting point and the first meeting point is 20 km (2) The speed of car B What I do is 110 kilometers. If not, please explain the reason Oh, your answers are different. I don't know which one is right
There are two cases
In the first case, the speed of a is less than that of B
Distance: (50x3 + 20 + 50) △ 2 = 110 (km)
Speed of car B: 110-50 = 60 (km / h)
In the second case, the speed of a is greater than that of B
Distance: (50x3-20 + 50) △ 2 = 90 (km)
Speed of vehicle B: 90-50 = 40 (km / h)
You've missed a situation
On a certain highway, the distance between a and B stations is 216KM. At 16 o'clock on a certain day, a and B vehicles start from a and B stations at the same time and go opposite each other
It is known that the speed of car a is 90km / h and that of car B is 72km / h. When do the two cars meet?
Please use the equation solution!
Suppose we meet in X hours, the distance of car a is 90x, and that of car B is 72x
The sum of the two car distances is the distance between the two places
90x + 72x = 216
x=1.33h.
(presumptuous question, is a and B 216? I think it's 162.)
The distance between a and B stations on a highway is 216KM. At 16 o'clock on a certain day, cars a, B start from a and B stations at the same time and go in opposite directions
The speed of car a is 90km / h and that of car B is 72km / h. When do the two cars meet
As long as the answer is satisfied
Suppose we meet in X hours, the distance of car a is 90x, and that of car B is 72x
The sum of the two car distances is the distance between the two places
90x + 72x = 216
33 hours is equal to 1 hour 20 minutes
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