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The distance between the two places is 720 kilometers, and the passenger cars and freight cars are running from both places at the same time. It is known that the passenger cars are 80 kilometers per hour, and the speed ratio of the passenger cars and freight cars is 4:3. After a few hours, the distance between the two cars is 20 kilometers?
80 △ 4 * 3 = 60 (km) Freight car speed
(720-20) / (80 + 60) = 5 (hours)
On a map with a scale of 1:5000000, the distance between a and B is 9.6cm. Buses and trucks start from a and B at the same time for 4 hours
On a map with a scale of 1:5000000, the distance between a and B is 9.6cm. Buses and trucks start from a and B at the same time and meet each other in four hours. It is known that the speed ratio of buses and trucks is 2: how many kilometers do buses and trucks travel per hour?
The distance between a and B is: 9.6x5000000 = 48000000cm = 480km
If the speed of passenger car is x, the speed of freight car is 3:2x
(x+3:2x)x4=480
x=48
48x3:2=72km 9.6*5000000*10^(-6)=480km
480/4=120km/h
Bus = 120 * 2 / 5 = 48km / h
Truck = 120 * 3 / 5 = 72km / h
On the map with a scale of 1:2000000, it is measured that the distance between a and B is 18cm, and the passenger cars and freight cars are facing each other from a and B at the same time,
When we meet four hours later, we know that the speed of the bus and the truck is 5:4. What is the speed of the bus and the truck?
If the speed of passenger car is x, the speed of freight car is 4 / 5x
The distance between a and B is: 18 × 2000000 = 36000000 (CM) = 360 (km)
（x+4/5x）×4＝360
x＝50
Truck: 4 / 5 × 50 = 40 (km / h)
A: the speed of bus and truck is 50 km / h and 40 km / h respectively
Passenger cars and freight cars leave from city a and city B at the same time. Passenger cars travel 80 kilometers per hour and freight cars 70 kilometers per hour. When the two cars meet again, passenger cars compare goods
How much is the distance between the two cities?
Solution,
Suppose x hours later, the two cars meet
Because when the two cars meet again, the bus travels 45 kilometers more than the goods
Then the difference between the distance of bus and truck is 45x2 = 90km
According to the meaning of the title
80X-70X=90
Solution
X=9
What is the distance between a and B
80x + 70X = 150x = 150 * 9 = 1350km
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