A plane flies 240 meters per minute, B flies 15 minutes, C flies 3600 meters in total

The flight speed of the plane is 240 meters per minute, flying for 15 minutes, Q: how many meters in total?
The plane flew for 15 minutes, a total of 3600 meters. Q: what's the flight speed per minute
How many minutes does it take to fly 3600 meters

A plane flies between two cities. When there is no wind, it flies 552 kilometers per hour. In a round-trip flight, it takes 5.5 hours to fly with the wind and 6 hours to fly against the wind. The speed of the wind in this flight is calculated

Let the speed of the wind be x km / h. according to the meaning of the question, we get: (552-x) × 6 = (552 + x) × 5.5, and the solution is x = 24. A: the speed of the wind is 24 km / h

Junior high school navigation problems application
A section of waterway, a ship in still water is 8 km / h, the time ratio of downstream and upstream in this waterway is 1:2, a day, heavy rain, water speed is 2 times as usual, a total of 9 hours to and fro, how long is the waterway?

Let the velocity of water flow be x and the length of waterway be y, and solve the quadratic equation of one variable
2Y divided by (8 + x) = y divided by (8-x)
Y divided by (8 + 2x) + y divided by (8-2x) = 9
The solution is x = 8 / 3, y = 24

Practical problems of ship navigation
It takes 1.5 times as long for a ship to sail upstream as it takes to sail downstream. Today, two ships set out from a and B at the same time, facing each other and meeting each other in three hours
If two ships have the same speed in still water
How long does it take for a ship to complete the whole journey downstream and upstream respectively?
What is the ratio of water velocity to ship velocity in still water?
How long does it take for a ship to go from a to B in still water?
I think the speed of water should be
3 * 1 + 3 (1 + 2 water) = 7.5
Water = 0.25
It's 7.25 / 1.25 = 6

Let the upstream velocity be 1, the still water velocity be 1 + the water velocity, and the downstream velocity be 1 + 2 * the water velocity. (in fact, it should be better to have a higher still water velocity of 1.) the whole course = 3 hours * (a ship's speed + B ship's speed) = 3 * (1 + 1.5) = 7.5,1. So the downstream velocity needs 7.5 / 1.5 = 5 hours, and the downstream velocity needs 7.5 / 1 = 7.5 hours (1 + 2 * water velocity) / 1 = 1.5 = 3 /

For any six non-zero natural numbers, the difference between at least two numbers is a multiple of 5. Why?

If two numbers are equal, naturally the difference between the two numbers is 0, which is a multiple of 5
If these five numbers are not equal, then the remainder divided by 5 can only be 0, 1, 2, 3 and 4. There must be two numbers with the same remainder divided by 5. The difference between the two numbers divided by 5 must be 0, that is, it can be divided by 5, which is a multiple of 5

The number of multiples of a nonzero natural number is (), the smallest is (), and the largest is ()

The number of multiples of a non-zero natural number is (infinite), the smallest is (itself), and (does not have) the largest

A non-zero natural number whose maximum factor and minimum multiple are______ ．

For example, the factor of 5 has 1 and 5, the maximum factor is 5, the multiple of 5 has 5, 10, 15, 20 Where the minimum multiple is: 5, so, a non-zero natural number, its maximum factor and minimum multiple are itself

What is the maximum factor of a natural number The minimum factor is The minimum multiple is__ ．

The maximum factor of a natural number is itself, the minimum factor is 1, and the minimum multiple is the problem itself

Is the maximum factor and the minimum multiple of a nonzero natural number equal?
By the way, it is also a judgment question
In 2010, 0 is used to occupy the space. () judge right or wrong
Another question, Wang Lijia's bank mortgage of 4500 yuan on April 5, what does this mean? Is it 4500 yuan? Or 4500 yuan?

Yes, it's all in itself

The number of multiples of any nonzero natural number is () and any nonzero natural number has a factor ()

The number of multiples of any nonzero natural number is (infinite), and any nonzero natural number has a factor (1 and itself)

A plane flies 240 meters per minute, B flies 15 minutes, C flies 3600 meters in total