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On a map with a scale of 0-60-120-180 km, it is measured that the distance between a and B is 12 cm How long does it take for this train to complete the journey from place a to place B?
It can be seen from the scale: 1 cm on the map represents the actual distance of 60 km
60x12÷80
=720÷80
=9 (hours)
A: the whole journey of this train takes 9 hours
I'm glad to solve the above problems for you. I hope it will be helpful to your study
On the map with the scale of 1:4000000, the distance between a and B is 20cm. Two trains leave from a and B at the same time, and a runs every hour
55km, B 45km per hour, how many hours do the two cars meet?
A tour group goes to the world horticultural exposition. Each car has 30 passengers. When one car breaks down, all the passengers on the car are transferred to other cars. Each car has 5 more passengers. How many people are there in the tour group?
If you take 15 colored balls out of the first bag and put them into the second bag, this is the colored balls in the second bag, which is exactly five seventh of the first bag. There are 25 colored balls in the second generation, and how many in the first generation?
Say all three questions
1. 20 × 40 ÷ (55 + 45) = 8 hours
2. 30 △ 5 × (30 + 5) = 210 people
3. (25 + 15) △ 5 / 7 + 15 = 71
On the map of scale yes, the distance between a and B is 20 cm. Two trains leave from a and B at the same time. A travels 55 km per hour, B 45 km per hour. How many hours do the two trains meet?
40 × 20 = 800 (km), 800 △ 55 + 45, = 800 △ 100, = 8 (hours); answer: two cars meet in 8 hours
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