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The fastest speed of a car is 140 kilometers per hour, which is equivalent to 115 times the speed of a supersonic plane. How many kilometers per hour does this supersonic plane fly?
A: this kind of supersonic aircraft flies 2100 kilometers per hour
On the highway, the car overtakes the bus, and the speed of the bus is ()
A. 100% B. 91.7% C. 120% d. 5%
Hey, hey, I didn't write all about it just now. Choose B,
Cars travel 63 kilometers per hour, which is 1.4 times as much as trucks. They start from two places 270 kilometers apart and travel in opposite directions for several hours
Truck speed 63 △ 1.4 = 45
Encounter time 270 △ 63 + 45 = 270 △ 108 = 2.5 hours
A car travels 68 kilometers per hour, twice as fast as a truck. They travel from two places 357 kilometers apart and face each other
(1) How many kilometers did the two cars travel when they met?
(3) if the departure time is 8:45, what time is the meeting time? There should be a formula
1. Because the speed of the car is twice that of the truck, the speed of the truck is 34 km / h, and the time is set as t, 68T + 34T = 357, so it will meet after 3.5 hours
2. Car: 68 * 3.5 = 238km, truck: 34 * 3.5 = 119km
3.8:45 + 3:30 = 12:15
RELATED INFORMATIONS
- 1. A car travels 68 kilometers per hour. The speed of a car is twice that of a truck (1) After a few hours? (2) How many kilometers did the two cars travel when they met? (3) If the departure time is 8:45, what time is the meeting time?
- 2. Eight people take two cars with the same speed to the railway station at the same time, and each car takes four people (excluding the driver) One of the cars broke down 10km away from the railway station, and there was still 40 minutes to stop checking in. At this time, the only available means of transportation was another car. It was known that the car, including the driver, was limited to five people, and the average speed of the car was 40km / h. The average walking speed of people was 4km / h, The calculation shows that these 8 people can get to the railway station before stopping checking in
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- 6. A and B drive in opposite directions from city a at the same time. Car a travels 55.5 kilometers per hour, while car B travels 34.5 kilometers per hour. After a few hours, the distance between the two cars is 270 kilometers?
- 7. A and B leave 480 kilometers apart at the same time. A travels 65 kilometers per hour and B 55 kilometers per hour. A few hours later, the two vehicles are 120 kilometers apart
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- 12. When the car completes half of the whole journey, the big car is 48 kilometers away from A. when the car arrives at B, the big car just completes four fifths of the whole journey. How many kilometers are there between a and B?
- 13. A car runs on a highway with an average speed of 80km per hour. After six hours, there is just 60% of the whole journey left How many kilometers is this highway!
- 14. The speed of a car can reach 180 km / h, which is 7 / 8 slower than that of a supersonic plane. How many km / h is the speed of this supersonic plane?
- 15. The truck was driving at 35 kilometers per hour, and the car was catching up at 50 kilometers per hour. They met five hours later
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