The train covered the distance between the two cities in 9 hours, and the car in 7 hours. Find the train speed if the train
| November 25, 2020 | education
The train covered the distance between the two cities in 9 hours, and the car in 7 hours. Find the train speed if the train speed is 18 km / h less than the car speed, and the distance between cities by rail and highway is equal.
x-train speed.
Then the vehicle speed is 18 + x.
We know the time for the passage of the train and car, 7 hours and 9 hours.
Let’s make an equation and solve:
x * 9 = (18 + x) * 7
9x = 126 + 7x
9x-7x = 126
2x = 126
x = 126/2
x = 63 km / h-train speed.
Answer: 63 km / h.
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