Question

Два велосипедиста выехали одновременно навстречу друг другу.Первый ехал со скоростью 12 км/ч.Второй проехал до встречи на 9 км больше,чем первый.С какой скоростью ехал второй велосипедист,если он встретился с первым через 3 часа?срочно надо прошу

Answer 1

1) 12х3=36 (км)- проехал 1 велосипедист.
2) 36+9=45 (км) - расстояние которое проехал 2 велосипедист.
3) 45:3=15 (км/ч)
Ответ: 15 км/ч ехал 2 велосипедист.

Answer 2

Problem Analysis

We have two cyclists who start simultaneously and are moving towards each other. The first cyclist is traveling at a speed of 12 km/h. The second cyclist travels 9 km further than the first cyclist before they meet. We need to find the speed at which the second cyclist is traveling.

Solution

Let's break down the problem step by step:

1. Let's assume the speed of the second cyclist is x km/h. 2. The first cyclist travels for 3 hours at a speed of 12 km/h. Therefore, the distance traveled by the first cyclist is 12 km/h * 3 hours = 36 km. 3. The second cyclist travels for 3 hours at a speed of x km/h. Therefore, the distance traveled by the second cyclist is x km/h * 3 hours = 3x km. 4. The second cyclist travels 9 km further than the first cyclist before they meet. So, the total distance traveled by the second cyclist is 36 km + 9 km = 45 km. 5. Since the total distance traveled by the second cyclist is 45 km and the time taken is 3 hours, we can set up the equation: 3x = 45. 6. Solving the equation, we find that the speed of the second cyclist (x) is 15 km/h.

Therefore, the second cyclist is traveling at a speed of 15 km/h.

Answer

The second cyclist is traveling at a speed of 15 km/h.

Explanation

The first cyclist is traveling at a speed of 12 km/h and travels for 3 hours, covering a distance of 36 km. The second cyclist travels for 3 hours and covers a distance of 45 km, which is 9 km further than the first cyclist. Therefore, the speed of the second cyclist is 15 km/h.