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The two cars run from 630 kilometers away at the same time. After 4.2 hours, the two cars meet. It is known that car B travels 70 kilometers per hour, and how many kilometers does car a travel per hour?
630 △ 4.2-70, = 150-70, = 80 (km / h); answer: car a travels 80 km per hour
Car a and car B leave 324km apart from each other at the same time. After 4 hours, they meet each other. Car a travels 42km per hour while car B travels 42km per hour
How many kilometers
Solve by equation
If vehicle B travels x kilometers per hour, then (x + 42) × 4 = 324
x+42=81
x=39
Car B travels 39 kilometers per hour
A passenger car and a freight car run from two places 315 km apart for 3.5 hours at the same time. The freight car runs 40 km per hour. How many km per hour does the passenger car run
When we met, the truck drove: 40 * 3.5 = 140 km
Then the bus starts in 3.5 hours: 315-140 = 175 km
So the bus travel per hour: 175 / 3.5 = 50 km
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