Question

Составьте выражение и найдите его значение .Расстояние между двумя пунктами 30,4 км.Из этих пунктов одновременно навстречу друг другу выехали два велосипедиста.Скорость первого 11,5 км/ч ,второго_13,2км/ч.Какое расстояние будет между ними через час?

Answer 1

30,4-11,5=18,9-13,2=5,7 км

Answer 2

Problem Analysis

We are given the following information: - Distance between two points: 30.4 km - Speed of the first cyclist: 11.5 km/h - Speed of the second cyclist: 13.2 km/h

We need to find the distance between the two cyclists after one hour.

Solution

To find the distance between the two cyclists after one hour, we need to calculate the distance each cyclist has traveled in one hour and then subtract the two distances.

Let's calculate the distance traveled by each cyclist in one hour:

- Distance traveled by the first cyclist in one hour = Speed of the first cyclist * Time = 11.5 km/h * 1 hour = 11.5 km - Distance traveled by the second cyclist in one hour = Speed of the second cyclist * Time = 13.2 km/h * 1 hour = 13.2 km

Now, let's find the distance between the two cyclists after one hour by subtracting the two distances:

- Distance between the two cyclists after one hour = Distance traveled by the first cyclist - Distance traveled by the second cyclist = 11.5 km - 13.2 km = -1.7 km

The distance between the two cyclists after one hour is -1.7 km.

Note: The negative sign indicates that the second cyclist is ahead of the first cyclist after one hour.

Conclusion

The distance between the two cyclists after one hour is -1.7 km.