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Seek master solution elementary school mathematics application problem ~! Urgent~~~~~~ Lele drinks a glass of milk in four times. For the first time, he drinks 1 / 5 of a glass, and then fills it with water. For the second time, he drinks 1 / 4 of a glass, and then fills it with water. For the third time, he drinks 1 / 2 of a glass, and then fills it with water. For the fourth time, he drinks it all in one gulp. Does Lele drink more milk or more water
1 / 5 + 1 / 4 + 1 / 2 = 19 / 20 cups of water
I drank a glass of milk
1 over 19 / 20
So there's a lot of milk
To build a highway, it is planned to build 1.2km a day, which is 0.2km less than the actual one. In fact, the highway is completed five days ahead of schedule. How many kilometers is the total length of the highway
To build a highway, it is planned to build 1.2km a day, which is 0.2km less than the actual one. In fact, the highway is completed five days ahead of schedule. How many kilometers is the total length of the highway
Analysis: what is repaired 5 days in advance is 1.4 * 5 = 7. In 7 km, 0.2 km is less repaired every day. It is planned that it will take 14 days to complete the repair, so multiplying by the planned daily repair is the total distance
(1.2 + 0.2) × 5 △ 0.2 × 1.2 = 42 km
A: the total length is 42 kilometers
If the speed of each person increases by 1 km / h, the meeting place is 1 km away from the previous meeting place______ ．
The time when a and B meet after increasing speed is: 60 △ 6 + 2 = 60 △ 12 = 5 (hours); suppose a's speed is x kilometers per hour, according to the question: 6x-5 (x + 1) = 1x-5 = 1x = 6; then B's speed is: 60 △ 6-6 = 4 (kilometers); (because this question does not explain who's speed is fast, similarly, B's speed can be set as X, then
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