Hurry up and help, good bounty 200

According to the average speed of Xiaoqiang going up and down the mountain, the time it takes him to go up and down the mountain can be calculated:

10 (hours).

Then the time it took him to descend was:

The speed of descent from 4 (hours) is: 24 4 = 6 (kilometers per hour).

Answer: Xiaoqiang's descent speed is 6 kilometers per hour.

The average speed of going up and down the mountain is, then the total time is 24*2, and the time when going up is 24 4=6, so the time taken to go down is 10-6=4 hours, and the speed of going down is 24 4=6

Let v, by the total distance Total time = average speed, i.e. 48 (24 4 + 24 V) = , v = 6

24-2 hours ......Time to go up and down the mountain.

24 4=6 hours ......Time to go up the mountain.

24 (10-6) = 6 km hours ......Downhill speed.

Set to x(24*2) [(24 6)+(24 x)]=

Solve x and you're done!! x=6

If it's right, choose me!!

Ascent time 24 4=6

It took a total of 48 hours

The descent time is 10-6=4

Descent speed 24 4=6

Solution: Set the speed of the descent x kilometers.

2/（1/4+1/x）=x=6

The law of translational Zen rolling is to add up and subtract from the left, subtract from the right, horizontal movement is to add and subtract from the abscissa, and longitudinal movement is to add or subtract from the ordinate.

So a'（√3-3√2，3），b'（-2√2，0），c'（3-3√2，0）

3 2 The length of the swim is the hypotenuse of the isosceles right triangle of the side length of 3, which is cut off with a compass. To find the length of an irrational number, you generally find the hypotenuse of a right-angled triangle with a right-angled side as an integer, and then use a compass to cut off the length of the hypotenuse.

Although late, I hope it helps you.

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