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The distance between the two places is 250 km. The passenger cars and freight cars start from the two places at the same time. The passenger cars travel 60 km per hour and the freight cars 55 km per hour. How many km are the two cars apart in two hours? (several cases can be worked out)
60 × 2 = 120 (km) 55 × 2 = 110 (km) (1) 250-120-110 = 130-110 = 20 (km) a: after 2 hours, the distance between the two vehicles is 20 km. (2) 250-120 + 110 = 130 + 110 = 240 (km) a: after 2 hours, the distance between the two vehicles is 240 km. (3) 250-110 + 120 = 140 + 120 = 260 (km) a
The distance between a and B is 460 km. The passenger cars and freight cars start from a and B at the same time and travel in opposite directions. The passenger cars travel 60 km per hour and the freight cars 55 km per hour? How many kilometers more passenger cars travel than freight cars when they meet?
(1) According to the meaning of the question: (60 + 55) x = 460, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 115x = 460, & nbsp; 115x △ 115 = 460 △ 115, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 4, answer: after 4 hours, two cars meet each other
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