The volume of water formed into ice increased by 1 / 11, and the volume of water formed by ice decreased by several parts The two trains run in opposite directions from station a and station B at the same time and meet at a distance of 4km from the midpoint. It is known that the speed of the local train is 5 / 6 of that of the express train. How many kilometers is the distance between station a and station B?

The volume of water formed into ice increased by 1 / 11, and the volume of water formed by ice decreased by several parts The two trains run in opposite directions from station a and station B at the same time and meet at a distance of 4km from the midpoint. It is known that the speed of the local train is 5 / 6 of that of the express train. How many kilometers is the distance between station a and station B?

When the volume of water is V, it forms ice and becomes 12 / 11V
When the volume of ice is a, it becomes 11 / 12a of water
So it's 1 / 12 less
The distance of the local train is 5 / 11
The distance of the express is 6 / 11
Go fast, go 1 / 11 more
The extra distance of the express is 8 kilometers
So the distance between the two stations is 8 divided by 1 / 11, that is 88 km

After water becomes ice, its volume increases by 110. When ice melts water, how much of its volume decreases?

Let the volume of water be 1, then: the volume of ice is 1 × (1 + 110) = 1110, which is reduced after water is formed: (1110-1) △ 1110 = 110 △ 1110 = 111; a: the volume is reduced by 111

After water becomes ice, its volume increases by 110. When ice melts water, how much of its volume decreases?

Let the volume of water be 1, then: the volume of ice is 1 × (1 + 110) = 1110, which is reduced after water is formed: (1110-1) △ 1110 = 110 △ 1110 = 111; a: the volume is reduced by 111

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Yes