![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
How many years can a city use the first drop of water from each household's tap?
Suppose there are 1 million people and 250000 families in a city. A drop of water from each family is 250000 drops. If 20 drops per milliliter is calculated, it is 12.5 liters. It doesn't work for a city
Will the meter move when the tap drips
If the water output is less than the sensitivity of the meter, it will never go. Many people use this to steal water
There are two trains running from the opposite direction of station a and station B at the same time. The first time they met 40 kilometers away from station a, the two trains are still moving forward at the original speed
After arriving at each other's starting station, they return immediately, and then meet for the second time at a place 80 kilometers away from station A. how many kilometers is the distance between station a and station B?
The first time we met, two cars traveled a whole journey, a car: 40 kilometers
For the second meeting, if the two cars travel three full distances, then a should travel: 3 * 40 = 120 km
At this time, it is 80 kilometers away from station A. in fact, another 80 kilometers is the whole journey
So the whole distance is: (120 + 80) / 2 = 100 km
RELATED INFORMATIONS
- 1. Two trains start from two stations at the same time. Car a runs 48 kilometers per hour and car B 78 kilometers per hour. After 2.5 hours, the two trains meet. How long is the railway between the two stations?
- 2. The two trains were running opposite each other at the same time. The first time they met was 4000 meters away from station a. the two trains were still running at the same speed, and they returned immediately after arriving at the same time Meet at 20 kilometers away from 100 million stations Detailed formula and
- 3. Xiaoqiang took the bus at his home to the railway station. After driving 1 / 3 of the distance, he estimated that he would not be able to catch up with the time when the train arrived. So he got off the bus and took a taxi. The speed doubled. As a result, he arrived 5 minutes earlier than only taking the bus and caught up with the train at the railway station. Given that the average speed of the bus is 40 km / h, how far is it from Xiaoqiang's home to the railway station?
- 4. A high-speed railway train and a EMU are running from city a to city B. It takes 5 hours for high-speed railway and 7.5 hours for EMU. It is known that the speed of high-speed railway train is higher than that of EMU The speed of high-speed train and the distance between a and B should be calculated
- 5. Next to the railway line, there is a highway along the direction of the railway. On the highway, a tractor is driving at the speed of 20 kilometers per hour. At this time, a 370 meter long fire line is running It took 37 seconds for the train to pass by the tractor from the front to the rear. It was very urgent,
- 6. Next to the railway, there is a highway along the direction of the railway. On the highway, a car is running at the speed of 10 meters per second. At this time, a train is running at the speed of 21 meters per second It took 2.5 seconds to drive from the back, from the front to the back, past the car. How long is this train?
- 7. The railway between station a and station B is 660 kilometers long. At 10:30 in the morning, a train runs from station a to station B at a speed of 90 kilometers per hour, At the same time, there is a train going from station B to station a at the speed of 75 kilometers per hour. How long can the two trains meet
- 8. The railway between station a and station B is 1800 km long. At 10:30 pm on September 30, a train runs from station a to station B at a speed of 90 km per hour At 12:00 that night, a train was going from station B to station a at the speed of 95 kilometers per hour. What month, day and hour did the two trains meet
- 9. There are eight railway stations on a railway. If a passenger car has to stop at each station during the round trip, how many kinds of tickets should the Railway Bureau prepare for this line
- 10. On the railway from station a to station B, there are five stations. How many different fares do you need for the train from station a to station B? How many different tickets do you need to prepare?
- 11. If a faucet drips 2 drops per second, try to design an experiment to calculate the water loss in one day and night
- 12. How many kilogram of water will be wasted in the first quarter of 2012 Please make a formula
- 13. A dripping tap drips 12 kg of water every day. According to this calculation, it will waste () kg of water in the first quarter of 2011
- 14. How many drops of water can the tap drop in an hour And say how much water would be wasted in 24 hours
- 15. The faucet drips 2 drops per second, 0.05 ml per drop. Xiao Ming didn't tighten the faucet after washing his hands. When Xiao Ming left for 4 hours, How many milliliters of water is dripping from the tap
- 16. How many tons of water can a household faucet discharge in 14 hours? The pipe pressure is 0.20 MPa
- 17. How many tons of water can a domestic water pipe flow in an hour? A faucet will do
- 18. How much water can you drip in 10 minutes when the tap is not closed? And how much water will be wasted in 24 hours
- 19. In the second math problem of junior high school, a pool has one inlet tap and one outlet tap. If the two taps are opened for half an hour at the same time, the empty pool can be filled with water. For example, Guo can open ten taps at the same time A pool has one inlet tap and one outlet tap. If the two taps are opened for half an hour at the same time, the empty pool can be filled with water. For example, if Guo turns off the tap after opening for one tenth of an hour at the same time, the empty pool can also be filled after another quarter of an hour. How many hours can the ball open the inlet tap to fill the empty pool? Well, this chapter is about the real fractional equation!
- 20. How much water does a running faucet waste in an hour