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A bus and a truck run in the opposite direction from the same place at the same time, with a distance of 400 kilometers after 4 hours. It is known that the bus travels 58 kilometers per hour, and how many kilometers does the truck travel per hour?
400÷4-58
=100-58，
=42 (km)
A: the truck travels 42 kilometers per hour
Passenger cars and freight cars start from the two places at the same time and meet in five hours. Freight cars travel 50 kilometers per hour and passenger cars travel 65 kilometers per hour. How long is the railway between the two places?
（50+65） × five
=115 × five
=575 (km);
A: the railway between the two places is 575 kilometers long
The length between Party A and Party B is 720 kilometers. Buses and trucks leave from the two places at the same time. Buses travel 65 kilometers per hour and trucks travel 55 kilometers per hour. After a few hours, they meet
The solution is assumed to meet after X hours
（65+55）x=720
120x=720
x=6
The railway between Party A and Party B is 480 kilometers long. Passenger cars and freight cars leave from the two places at the same time. After 4 hours of opportunity, it is known that passenger cars travel 65 kilometers per hour, The truck travels x kilometers per hour. The incorrect equation is () A、65 × 4+4x=480 B、4x=480-65 C、65+x=480÷4 D、(65+x) × 4=480
B、4x=480-65
From city a to city B, the passenger train will travel for 10 hours and the freight train will travel for 15 hours. If two vehicles travel from city a to city B at the same time Starting from cities a and B, the distance between the two vehicles is 140 kilometers in 7 hours. How many kilometers is the distance between cities a and B [process] page 104
7 hours, a opened 7 / 10, B opened 7 / 15, more than the whole journey
So 140 / (7 / 15 + 7 / 10-1) = 840 km
The bus and truck start from the two places at the same time and travel opposite each other. It takes 2 hours for the bus to complete the whole journey and 3 hours for the truck to complete the whole journey. When the two cars meet, the bus stops We walked 30 kilometers, and the distance between the two places was () kilometers
Meeting time of two vehicles = 1 ÷ (1 / 2 + 1 / 3) = 6 / 5 hours
Bus speed = 30 ÷ 6 / 5 = 25 km / h
Distance between two places = 25 × 2 = 50 km / h
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