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A car from a to B, after 8 / 15 of the whole journey, over 1.2km. What's the distance between a and B
1.2 / (8 / 15-1 / 2) = 36 km
A car drives from a to B, 3 / 8 of the whole journey, 15 kilometers away from the midpoint. How many kilometers are there between a and B?
Three eighths of the way, 15 kilometers from the midpoint,
That is to say, there is a distance of 15 kilometers from 3 / 8 of the whole journey to the midpoint (1 / 2 of the whole journey)
15 km accounts for 1 / 2-3 / 8 = 1 / 8 of the whole journey
therefore
Distance between a and B
=15/(1/8)
=120 km
When a car goes from a to B, it takes two fifths of the whole journey in the first hour. In the second hour, it takes 12 kilometers more than the first hour. At this time, it is just the whole journey from B
How many kilometers is the whole journey?
The second hour, 1-1 / 10-2 / 5 = 1-1 / 10-4 / 10 = 1 / 2
The whole course is 12 (1 / 2-2 / 5) = 12 △ 0.1 = 120 km
A car has traveled two fifths of its total length from a to B. at this time, it is 30 kilometers away from A. how many kilometers away is it from B?
30 divided by 2 / 5 is equal to the total length from a to B, which is 75 meters. The total length of 75 meters minus the distance from a is 30 meters, and the distance from B is 45 meters
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