The distance between two stations P and Q is 400 km. A and B start from stations P and Q respe..

Описание к видео The distance between two stations P and Q is 400 km. A and B start from stations P and Q respe..

The distance between two stations P and Q is 400 km. A and B start from stations P and Q. respectively, at the same time towards each other, and the speed of B is 10 km/h more than the speed of A. If the difference between the distance of A and B after 3 hours since starting is 70 km, find the speed of B in km/h.

1.60. 2.85. 3.75. 4.50

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