Question

Велосипедист несколько часов ехал со скоростью 12 км в час а остальной путь он проделал за 4 часа со скоростью 15 км ч весь путь составил 96 км ч Сколько времени велосипедист ехал первую часть пути

Answer 1

1) 15*4= 60 км второй путь
2) 96-60= 36 км первый путь
3) 36/12= 3 часа
Ответ: 3 часа

Answer 2

Calculation of Time for the First Part of the Journey

To calculate the time the cyclist spent on the first part of the journey, we need to determine the distance traveled at a speed of 12 km/h. We can then use the formula `time = distance / speed` to find the time.

Let's denote the time spent on the first part of the journey as `t1`, the speed during this part as `v1`, and the distance traveled during this part as `d1`.

Given: - Speed during the first part of the journey: 12 km/h - Speed during the second part of the journey: 15 km/h - Total distance traveled: 96 km

We can set up the following equation to find `d1`: `d1 + (96 - d1) = 96`

Simplifying the equation, we get: `d1 = 96 - d1`

Solving for `d1`, we find: `2d1 = 96` `d1 = 48 km`

Now that we know the distance traveled during the first part of the journey is 48 km, we can calculate the time spent on this part using the formula `time = distance / speed`:

`time = 48 km / 12 km/h` `time = 4 hours`

Therefore, the cyclist spent 4 hours on the first part of the journey.