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On a 1:50000000 map, the distance between a and B is 6cm. How many meters should we draw it on a 1:30000000 map (2) On a 1:50 million map, the distance between airports A and B is 4 cm. How long does it take for a famous airline to fly from airport a to airport B at a speed of 500 km per hour? (3) On a map with a scale of 1:30000000, the distance between a and B is 5.5cm. How many kilometers will a car travel the next day when it completes the whole journey in two days at a ratio of 3:2?
1. On a 1:50000000 map, the distance between a and B is 6cm. How many meters should we draw it on a 1:30000000 map?
Actual distance: 6 △ 1 / 50000000 = 30000000 cm
Distance on the map: 300000000 × 1 / 3000000 = 100cm = 1m
A: one meter should be drawn
2. On a 1:50 million map, the distance between airports A and B is 4 cm. How long does it take for a famous airline to fly from airport a to airport B at a speed of 500 km per hour?
Actual distance: 4 △ 1 / 50000000 = 200000000 cm = 2000km
2000 △ 500 = 4 hours
A: it takes four hours to fly
3. On a map with a scale of 1:30000000, the distance between a and B is 5.5cm. How many kilometers will a car travel the next day when it completes the whole journey in two days at a ratio of 3:2?
Actual distance: 5.5 △ 1 / 30000000 = 165000000cm = 1650km
3+2=5
1650 × 2 / 5 = 660km
A: the next day's journey is 660 kilometers
On a map with a scale of 1:2000000, the distance between a and B is 6cm. If you draw it on another map with a scale of 1:3000000, the distance between a and B is 6cm
Draw on another map with a scale of 1:3000000
6 △ 1 / 2000000 × 1 / 3000000 = 4 (CM)
On a map with a scale of 1:2000000, the distance between a and B is 7.2cm, so on a map with a scale of 1:3000000
How many centimeters is the distance between a and B?
7.2÷1/2000000×1/3000000=4.8cm
The distance between a and B is 4.8cm
On the map with the scale of 1:2000000, the distance between a and B is 3.6cm. If the car leaves from a place at 8:00 a.m. at the speed of 30km / h, when will it arrive at B place after this journey?
3.6 △ 12000000 = 7200000 (CM) = 72 (km), 72 △ 30 = 2.4 (H), it is 10:24 after 2.4 hours from 8:00; a: it is 10:24 when we arrive at B
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