Help to solve a problem, Moscow and Tver to St. Petersburg on the same highway were left at the same time by 2 cars: from Moscow - automobile, and from Tver - cargo. Speed of the lorry is 50 km/h. What speed of the passenger car if it caught up cargo in 7 h after departure, and distance from Moscow to Tver with 168 km?

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1) 7*50=350 km - the lorry prior to a meeting 2) 168+350=518 km passed - the passenger car prior to a meeting 3) 518:7=74 km/h the answer passed: 74 km / час1) 168 6 7 = 24 (km/h) - speed after 2) 50 + 24 = 74 (km/h) car speed
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Answer add