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A passenger car and a freight car leave from ab at the same time. The speed of the freight car is 5 / 6 of that of the passenger car. After 1 / 5 of the freight car, it runs 56 kilometers. How many kilometers are there between AB and the passenger car?
5 / 6 (1 + 5 / 6) = 5 / 11
Distance: 56 △ 5 / 11-1 / 5 = 56 △ 14 / 55 = 220km
If you don't understand this question, you can ask,
The speed ratio of the bus to the truck is known to be 7:6, and the bus travels 9000 more per hour than the truck
M. how many hours does it take for a truck to get to B? Hurry up
7-6=1
Bus speed: 9 × 7 / 1 = 63 km / h
Truck speed: 9 × 6 / 1 = 54 km / h
Distance between the two places: (63 + 54) × 4 = 468 km / h
Time required for freight cars: 468 △ 54 = 8 and 2 / 3 hours
Someone rides a bicycle from land a to land B. at first, he travels at a speed of 18 kilometers per hour. When the rest of the journey is 32 kilometers less than what he has already traveled, he begins to complete the rest of the journey at a speed of 25 thousand mu per hour. If the average speed of the whole journey is 20 kilometers per hour, find the distance between the two places
Suppose the distance between a and B is x km, then it takes X / 20 hours to complete the whole journey, and the rest of the journey is 32 km less than the journey that has been passed, that is, the journey that has been passed is (x + 32) / 2 = x / 2 + 16 km, and the rest is (x-32) / 2 = x / 2-16 km, so there is (x / 2 + 16) / 18 + (x / 2-16) / 25 = x / 2050
Someone rides a bicycle from place a to place B. he starts from place a and takes 20 minutes to complete two fifths of the journey. Then he speeds up and travels 60 kilometers more every minute
15 minutes later, it will be 1.8 kilometers away from B. how many kilometers are there between a and B
The speed should not be the same as the equation
Starting from Jiadi, it takes 20 minutes to complete 2 / 5 of the whole journey, which is the same as the original speed. It takes 15 minutes to complete the whole journey: 2 / 5 △ 20 × 15 = 3 / 10
In fact, 15 minutes is enough: 3 / 10 of the whole journey is more than 15 × 60 = 900 meters, assuming that the speed is the same as before, and there is still 1.8 + 0.9 kilometers to the end point after (20 + 15) minutes, and the score is 1-2 / 5-3 / 10
According to: quantity of unit "1" = corresponding quantity △ corresponding fraction, the formula is listed as follows:
(1.8 + 0.9) / (1-2 / 5-3 / 10) = 9 km
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