Question

первые 12км пути путешествиник шел пешком, а остаток пути проехал на гоночном мотоцикле. Какое расстояние он проехал на мотоцикле,если скорость езды 160км/ч, скорость ходьбы 5км/ч, а средняя скорость оказалась равной 40км/ч?

Answer 1

12/5=2.4 ч шел пешком
пусть х ч- ехал на мотоцикле
5*2.4+160*х  /  2.4+х=40
12+160х=96+40х
120х=84
х=0.7 ч ехал на мотоц.
160*0.7=112 км проехал на мотоц.

Answer 2

Calculating Distance Traveled on Motorcycle

To calculate the distance traveled on the motorcycle, we can use the formula for average speed:

Average Speed = Total Distance / Total Time

Given: - Speed of walking = 5 km/h - Speed of riding = 160 km/h - Average speed = 40 km/h

Let's denote the distance traveled on foot as D1 and the distance traveled on the motorcycle as D2.

We can use the formula: Average Speed = (D1 + D2) / Total Time

We also know that: Total Time = Time Walking + Time Riding

The time walking can be calculated as: Time Walking = D1 / 5

The time riding can be calculated as: Time Riding = D2 / 160

We are given that the average speed is 40 km/h, so we can calculate the total time using the formula: 40 = (D1 + D2) / (D1 / 5 + D2 / 160)

Solving this equation will give us the distance traveled on the motorcycle.

Let's calculate it.