
Группа туристов 1ч ехала на автобусе , а затем 6 ч шла пешком со скоростью, на 18км/ч меньше
,скорости автобуса .Всего группа преодолела 67 км. Найдите скорость автобуса и туристов в пешем походе.

Ответы на вопрос




Calculating Bus and Walking Speeds
To find the speed of the bus and the tourists during the walking portion, we can use the following steps:
1. Identify the Given Information: - The group of tourists traveled 67 km in total. - They spent 1 hour on the bus and 6 hours walking at a speed 18 km/h slower than the bus.
2. Set Up Equations: - Let's denote the speed of the bus as b and the speed of the tourists during the walking portion as w. - The total time spent on the bus and walking is 7 hours.
3. Form Equations: - Using the formula: distance = speed * time, we can set up the following equations: - Equation 1: 1b + 6w = 67 (total distance traveled) - Equation 2: w = b - 18 (speed of walking is 18 km/h less than the bus)
4. Solve the Equations: - Substitute the value of w from Equation 2 into Equation 1 to solve for b.
5. Calculate the Speeds: - After finding the speed of the bus, we can then calculate the speed of the tourists during the walking portion.
Let's proceed with the calculations.
Calculation
Equation 1: 1b + 6w = 67 Equation 2: w = b - 18
Substitute w from Equation 2 into Equation 1: 1b + 6(b - 18) = 67 7b - 108 = 67 7b = 67 + 108 7b = 175 b = 175 / 7 b = 25 km/h
Now that we have the speed of the bus, we can calculate the speed of the tourists during the walking portion: w = b - 18 w = 25 - 18 w = 7 km/h
Conclusion
The speed of the bus is 25 km/h, and the speed of the tourists during the walking portion is 7 km/h.

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