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Math problem: 135 kilometers for slow train in 3 hours and 120 kilometers for fast train in 2 hours!
Time ratio of slow train to fast train: 3:2
Distance ratio of slow train to fast train: 135:120 = 9:8
Speed ratio of slow train to fast train: (135 △ 3): (120 △ 2) = 45:60 = 3:4
A math problem a and B are 120 kilometers apart. The speed of car a is 55 kilometers per hour, and that of car B is 45 kilometers per hour
The distance between AB and B is 120 km. The speed of car a is 55 km per hour, and that of car B is 45 km per hour
(1) The two cars go from a and B in the same direction at the same time (a is behind b). How long does it take for car a to catch up with car B?
(2) How long does it take for the two cars to travel from a and B at the same time? The distance between the two cars is 10 km?
Come on!
Thank you!
Use equations to solve practical problems.
AI Xi Xue Ni 0730, (1) two cars are going from a and B in the same direction at the same time (a is behind b), how long does it take for car a to catch up with car B? Suppose that after X hours car a catches up with car B (55-45) x = 12010x = 120x = 12 (2) two cars are going from a and B in the same direction at the same time, how long does it take for car a to catch up with car B
The distance between city a and city B is 500 km, and car a and car B leave from the two cities respectively. The speed of car a is 45 km / h, if car B is faster,
The two cars meet 25 kilometers away from the terminal after they are driving apart at the same time, so as to find the speed of car B
The distance between the two cities of AB is 500 km. A and B leave from the two cities respectively. The speed of a is 45 km / h. If b is faster, the two vehicles will meet 25 km away from the midpoint station after they leave at the same time. The speed of B is calculated
（500÷2+25）÷【（500÷2-25）÷45】
=275÷【225÷45】
=275÷5
=55 km / h
The distance between city a and city B is 680 kilometers. A car drives from city a to city B at the speed of 60 kilometers per hour. After 11 hours, can the car reach the city already?
60*11=660
660 less than 680
No
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