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Passenger cars travel 60 kilometers per hour and freight cars 50 kilometers per hour. Now two cars on a straight road start from a and B, 300 kilometers apart After five hours, how many kilometers are the two cars apart?
(50 + 60) × 5-300 = 250 km
It is known that the distance between a and B is 120km, a bus and a freight car
It is known that the distance between a and B is 120 km, the speed of a bus is 1.2 times that of a truck, and the bus takes 30 minutes less than that of a truck
Set the speed of freight car as X km / h
120/X-120/1.2X=0.5
120/X-100/X=0.5
20/X=0.5
X=40
The speed of the truck is 40 km / h
The distance between a and B is 496 km. A bus from a to B runs 64 km per hour for one hour
Because it's 64 kilometers per hour, it's 64 × 1 = 64 kilometers per hour. At this time, it's 496-64 = 432 kilometers away from Jiadi
On the map with a scale of 1:8000000, the distance between a and B is 8.4cm. A car travels from place a to place B at the speed of 64km per hour
How many hours does it take
According to the definition of scale, 1:8000000 = 8.4: X, so x = 672km. If the speed of a car is 645km / h, it will take 672 / 64 = 10.5h to go from place a to place B
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