Current location - Training Enrollment Network - Mathematics courses - Mathematical typhoon problem
Mathematical typhoon problem
1、

According to the meaning of the question, when the wind force in the typhoon center is 12, the wind force 200 kilometers away from the center is 4.

If point A is AD⊥BC in D, then point D is the closest point of typhoon center to city A.

It is known that ABC = 30, AB=240 km,

Available: AD = 120km? & lt? 200 kilometers,

Therefore, City A will be affected by the typhoon.

2、

Suppose that when city A begins to be affected by the typhoon, the center of the typhoon is point E; When city A is affected by typhoon, the typhoon center is point F; Yes: AE=AF=200 kilometers.

Available: DE = DF = 160km, EF = 320km.

Therefore, the duration of typhoon affecting city A is: 320/20? =? 16? hour

3、

Because, when the typhoon center reaches the nearest D point to A city, A city is the most affected by the wind.

So, it can be calculated: 12? -? 120/25? =? 7.2? ;

Taking the whole number, we can get: What is the maximum wind force affected by typhoon in City A? 7? Level.