The distance between a and B is 150 kilometers. A and B start from a and B respectively. It takes 10 hours for them to meet each other The distance between a and B is 150 kilometers. A and B start from a and B respectively. It takes 10 hours for them to meet each other. It is known that a's speed is 2 / 3 of B's speed, so how many hours does it take B to walk alone? A 50 / 3 B 15 C20 D 17 please write down the specific analysis ideas,

The distance between a and B is 150 kilometers. A and B start from a and B respectively. It takes 10 hours for them to meet each other The distance between a and B is 150 kilometers. A and B start from a and B respectively. It takes 10 hours for them to meet each other. It is known that a's speed is 2 / 3 of B's speed, so how many hours does it take B to walk alone? A 50 / 3 B 15 C20 D 17 please write down the specific analysis ideas,

From the question meaning: a speed + B speed = 150 / 10 = 15, a speed / b speed = 2 / 3x + y = 15x / y = 2 / 3x = 6, y = 9, it is easy to get that B speed is 9, time = 150 / 9 = 50 / 3, choose a

Car a and car B depart from two places 380 kilometers apart at the same time, and meet in three hours. It is known that the speed ratio of car a to car B is 10:9. How many kilometers did car B travel when they met?

380 × 910 + 9, = 380 × 919, = 180 km; a: when we met, car B traveled 180 km