The waterfall is between 272 300 above sea level. How is 272 calculated, please explain in detail, t

First of all, it is necessary to know the relationship between the waterfall and the bridge, and from the tributary on the right and the contour line that intersects it, it can be seen that the tributary flows from northeast to southwest (because the river flows in the opposite direction to the contour line bulge), and then it is said that the drop of the waterfall (the waterfall is usually a steep cliff) is 72 meters, and the bridge is downstream, so it can be understood that the waterfall is 72 meters higher than the bridge. It turns out that the height range of the bridge and the waterfall should be 200-300. But now because the drop is 72 meters, the waterfall cannot be lower than 272 meters, otherwise the 200-meter contour line will be drawn, the lowest waterfall is 272, then the bridge is the lowest 272-72 = 200.

The maximum waterfall is 300 meters, and the maximum bridge is 300-72 = 228 meters. That is, the waterfall range is 272-300. The bridge is 200-228.

Since the highest peak is 580 meters, the elevation difference with the bridge ranges from (580-228=352)-580-200=380). i.e. 352-380. Obviously, the closest answer is 360.

There is a problem parsing.

The waterfall is at least 72 meters higher than the bridge, and both the waterfall and the bridge are between 200-300 meters.

So the waterfall should be at least 272 meters high.

The title says that the drop of the waterfall is 72 meters, and you can calculate that the contour line on the left side of the river is 300, but the line of 200 meters is not drawn, so the height of the waterfall is within 200 to 300, and because the drop is 72, the lowest is 200 plus 72,272, if it is as low as 271, then the contour line of 200 meters will be drawn on **.

The drop of the waterfall of 72 meters needs to be considered. So the place is between 200-228 meters.

Double integration of the probability density function, and since the integration region is a rectangular domain, it can be done as a nest of two definite integrals. First, move the constant a to the outermost part and find the integral of the dy inside; Then calculate the integration of DX and get the result.

Tell you the rules of operation of the determinant directly.

The two determinants given in the problem are ad-(-cb) and db-ac

That is, the determinant is multiplying diagonally and then subtracting.

Draw a line with the Pen tool, then select the selection in the path to fill the color and stroke.

Use the Pen Tool to outline the curve and fill the path to this color, with a feathering effect.

Pen tool, color overlay, just choose the outer glow.

PS drawn,As for the brightness effect, it's treated with the outer glow inside fx.。

One day, Liu Hongtao met a foreign guest

If you want to calculate the mass, then you must have the density of the volume.

The density can be checked, and the volume and the meaning of the topic can also be calculated.

The volume is the base area * high.

It is 12 meters high.

The bottom area is a high draft hollow circle, how to calculate the area of the hollow prepared round Qi rolling filial piety,?Wouldn't it be counted out if you take a big circle and reduce the circle?

What else do you want? Do it yourself! ~~

Multiply by 80 squared and multiply by 12000The result obtained is multiplied by 75 or multiplied by 12000Multiply the fruit by the density of iron, and you get it.