The passenger train travels at a speed of 84 km / h, and the speed of a freight train is 75%
| September 3, 2021 | education
The passenger train travels at a speed of 84 km / h, and the speed of a freight train is 75% of the speed of a passenger train. What is the speed of a freight train?
1. If the speed of a passenger train equal to 84 km / h is 100%, let the speed of the freight train be x, then we will compose two expressions:
84 km / h = 100%,
x km / h = 75%.
2. Let’s use the “cross” rule and solve the equation:
84 * 75 = 100 * x,
6300 = 100x,
x = 6300/100,
x = 63 km / h.
Answer: the speed of a freight train is 63 km / h.
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