After flying from A to B at a speed of 250 kilometers per hour, an airplane immediately made a U tur

Let the air distance t between A and B

t/250+t/200=

9t/1000=

9t=6750

t=750A: The air distance between A and B is 750 kilometers.

If it takes x hours for an airplane to travel from A to B, it will take (hours) to fly back from B to A, according to the inverse proportional relationship in the title.

Going speed Going time = Coming back velocity Coming back time, the equation is obtained.

250x=200（

The solution is x=3250 3=750 km.

The air distance between A and B is 750 km.

Let the air distance between A and B be x

x/250+x/200=

x=750 km.

The flight of the aircraft can be divided into two parts, and then find the connection between these two flights, that is, the distance of the flight is equal, you can set this distance (that is, the distance between A and B) as s, because you know the speed of the round trip, you can use s to express the time required to go back and forth (to: s 250 return: s 200), and the title tells us that the total time of the round trip is s 250 + s 200 = the denominator on the left side of the equation is divided, and it is easy to solve s = 750 (km).

The velocity ratio is 250:200=5:4

Time ratio 4:5

Go to the time of hours.

The distance is 250x3=750 km.

In this problem, because the round-trip distance is unchanged, the distance is fixed, and the time and speed are inversely proportional to the inverse proportional equation, and the return time is used for x hours, and the time for going is (hours.

x = distance between two places: 200 km).

If the speed ratio is 250:200=5:4, then the time ratio should be 4:5 depending on the distance

If there are a total of hours, then 4 parts will be accounted for, and 5 parts will be accounted for, and each time is an hour.

The distance is 250*km.

Let the time for the plane to fly from A to B is x, and the time to fly from B to A, then 250 200 =, the solution is x = 3, and the air distance is 250 times x to get 750

If it takes x hours to go, then 250*x=200*(

i.e. 250 200 = (

So x=3, so the distance between the two places is equal to 3*250=750km

Round-trip time ratio = 200:250 = 4:5

So go when flying hours.

So the air distance between A and B = 250 3 = 750 km, I wish you a happy day.

t1:t2=v2:v1=200:250=4:5 km solution: let the air distance between A and B be x km.

x/250+x/200=

x=750

Solution: Let the air distance between A and B be xkm

2x+(2+

x=3375÷

x=750A: The spatial distance between A and B is 750km

If it takes x hours for an airplane to fly from A to B, it will take an hour (or y hour) to return from B to A.

The calculation method: The speed of A to B is 250 200 = times the speed of return) The time (hours) from A to B is 250 200 times the speed of return

The air distance between A and B = 250 3 = 750 (km) 2Proportional solution: 250:

y hours = 200: x hours to get y hours: x hours = :

1Flight time (hours) from A to B

The air distance between A and B = 250 3 = 750 (km) 3Equation solution: 250x=200(

x = 3 (hours).

The air distance between A and B = 250 3 = 750 (km).

An airplane flew from A to B at a speed of 250 kilometers per hour, immediately turned around in the air, and flew back to A at a speed of 200 kilometers per hour. (Answer in three ways).

Proportional solution: speed ratio: 250:200=5:4 flight time ratio is: 4:5

The air distance between A and B is:

750km equation solution: Let the air distance between A and B be xkm, then:

x/250+x/200=

x=750km

That is, the air distance between A and B is 750km

Let the air distance t between A and B

t/250+t/200=

9t/1000=

9t=6750

t=750A: The air distance between A and B is 750 kilometers.

Let the air distance between A and B be x kilometers.

x/250+x/200=

9x/1000=

x = 750 The air distance between A and B is 750 km.

The fleet size of the major domestic passenger airlines is as follows and the cut-off date is the last two months:

China Southern Airlines (China Southern Airlines Group) 309

International Airlines (Air China Group) 257

China Eastern Airlines (China Eastern Airlines Group) 250

Grand China Air (HNA Group) 90

Shenzhen Airlines (Air China Group) 89

Hainan Airlines (HNA Group) 81

Tianjin Airlines (HNA Group) 74

Shanghai Airlines (China Eastern Airlines Group) 70

Xiamen Airlines (China Southern Airlines Group) 51

Sichuan Airlines (Sichuan Airlines Group) 45

Shandong Airlines (Air China Group) 40

Capital Airlines (formerly Golden Deer Airlines, HNA Group) 25

Spring Airlines 18

Juneyao Airlines 14

Capital Airlines Business (a division of Capital Airlines) 13 business jets: Lucky Air (HNA Group) 8

Okay Airways 7

China United Airlines (China Eastern Airlines Group) 7

Chongqing Airlines (China Southern Airlines Group) 7

Guizhou Airlines (China Southern Airlines Group) 7

Chengdu Airlines (formerly Eagle United Airlines, Sichuan Airlines Group) 7

Happiness Airlines (China Eastern Airlines Group) 4

West Air (HNA Group) 3

Hebei Airlines (formerly Northeast Airlines, Sichuan Airlines Group) 3

Kunming Airlines (Air China Group) 3

Henan Airlines (formerly Kunpeng Airlines, Air China Group) 3

Companies that are not in parentheses are not in the airline group.

The total number of passenger aircraft is about 1483.

Cargo Carrier's Fleet:

China Post Aviation (China Southern Airlines Group) 16

China Cargo (China Eastern Airlines Group) 13

Air China Cargo (Air China Group) 9

Yangtze River Express (HNA Group) 9

Jade Cargo (Air China Group) 6

Shanghai Airlines Cargo (China Eastern Airlines Group) 6

Shenzhen Donghai 2

SF Airlines 2

Galaxy International 1

The total number of cargo planes is about 65.

The total number of aircraft is about 1548.

Let the air distance between A and B be x

x/250+x/200=

4x 1000 + 5x 1000 = (250 and 200 are divided into 1000).

4+5)x/1000=

9x/1000=

9x=6750

x=750 Answer: The air distance between A and B is 750 kilometers Complete, more detailed.

1.The air distance between A and B is x kilometers.

x/250+x/200=

x=750 km.

2.Set up square tiles with side length, and ask for x blocks.

x = 432 blocks.

The tile area is proportional to the number of tiles.

3.X people are required.

12-4)x=10*12

x = 15 people.

The number of people is inversely proportional to the number of days completed.

1) It took x hours when it was set to go, and then it was used back.

then 250x=(

Solution x=3 hours.

then distance = 250 * 3 = 750 km.

2) Set up x blocks.

Then (: solution x=432 blocks.

3) Set up x number of people.

Then 10:x=(12-4):12

Solution x=15 people.

16:00－10:00＝6：00

850 6 5100 km

A and B are 5,100 kilometers apart?

The round-trip speed of the aircraft is 250:200=5:4

The round-trip time ratio is 4:5

Time from A to B = hours.

The distance between A and B = 250 * 3 = 750 km.