Question

Из двух городов одновременно навстречу друг другу выехали велосипедист и мотоциклист. Скорость велосипедиста 15 км\ч. Он едет в два раза медленнее мотоциклиста. Через час велосипедист и мотоциклист встретились. Каково расстояние между городами?

Answer 1

15*2=30 скорость мотоцикла
15+30=45км/ч
45*1=45км

Answer 2

Problem Analysis

We are given that a cyclist and a motorcyclist start simultaneously from two different cities and travel towards each other. The cyclist's speed is 15 km/h, which is half the speed of the motorcyclist. After one hour, they meet each other. We need to find the distance between the two cities.

Solution

Let's assume the distance between the two cities is D km.

The motorcyclist's speed is twice that of the cyclist, so the motorcyclist's speed is 2 * 15 = 30 km/h.

Since the cyclist and motorcyclist travel towards each other, their combined speed is the sum of their individual speeds, which is 15 + 30 = 45 km/h.

We are given that they meet after one hour, so the total distance covered by both the cyclist and motorcyclist is 45 km/h * 1 h = 45 km.

Since they meet at the same point, the sum of the distances covered by the cyclist and motorcyclist is equal to the distance between the two cities, which is D km.

Therefore, we can set up the equation:

D = 45 km

So, the distance between the two cities is 45 km.

Answer

The distance between the two cities is 45 km.