Question

Велосипедист проехал половину пути за 2 часа,со скоростью 15 км. в час.Остальной путь со скоростью 10 км. в час.Сколько времени он был в пути?

Answer 1

1. 2*15 = 30 (км) - половина пути.
2. 30:10 = 3 (ч) - время на вторую половину пути.
3. 2+3=5 (ч) - время на весь путь.
Элементарно ;)
Удачи!)

Answer 2

1) 15*2 = 30 км - есть половина расстояния, которое он проехал.
А значит ему осталось тоже 30 км проехать (остальной путь)
2) 30/10 = 3 часа он ехал остальной путь
3) 3+2 = 5 часов был в пути.

Answer 3

Problem Analysis

We are given that a cyclist traveled half of the distance at a speed of 15 km/h and the remaining distance at a speed of 10 km/h. We need to find the total time taken for the journey.

Solution

Let's break down the problem into smaller steps to find the solution:

1. Calculate the time taken to travel half of the distance at a speed of 15 km/h. 2. Calculate the time taken to travel the remaining distance at a speed of 10 km/h. 3. Add the two times calculated in steps 1 and 2 to find the total time taken for the journey.

Step-by-Step Solution

1. Calculate the time taken to travel half of the distance at a speed of 15 km/h: - We know that time = distance / speed. - Let's assume the total distance is D. - The distance traveled in the first half is D/2. - The speed during this part of the journey is 15 km/h. - Therefore, the time taken to travel the first half is (D/2) / 15 = D/30 hours.

2. Calculate the time taken to travel the remaining distance at a speed of 10 km/h: - The remaining distance is also D/2. - The speed during this part of the journey is 10 km/h. - Therefore, the time taken to travel the remaining distance is (D/2) / 10 = D/20 hours.

3. Add the two times calculated in steps 1 and 2 to find the total time taken for the journey: - Total time = (D/30) + (D/20) = (2D + 3D) / 60 = 5D / 60 = D / 12 hours.

Answer

The cyclist was in the journey for D / 12 hours, where D represents the total distance traveled.

Let's assume the total distance traveled is 60 km for the sake of calculation. Therefore, the cyclist was in the journey for 60 / 12 = 5 hours.

Please note that the actual distance traveled is not provided in the question, so we cannot determine the exact time taken without that information.

If you have any further questions, please, let me know!