Anti-smuggling slogan in Shenzhen

Solution: According to the inverse theorem of Pythagorean theorem, it can be concluded that △ABC is a right triangle, and thus △CBD∽△CAB can be determined. Then, using the nature of similar triangles, the length of CD can be calculated, and the time to enter our territorial waters can also be calculated.

∫AC = 10，AB=6，BC=8，

∴AC =AB？ +BC? , that is, △ABC is a right triangle,

So as to judge △CBD∽△CAB,

Therefore, it is available.

BC CD

—— =——

Ac circuit breaker

Solution: CD=32/5 =6.4, and the ship speed is 12.8 knots.

need

6.4/12.8 =0.5 hours =30 minutes to enter our territorial waters.

In other words, it will enter our territorial waters at 10: 58 at the earliest.