Question

Велосипедист несколько часов ехал со скоростью 12 км/ч а остальной путь он проделал за 4 ч со скоростью 15 км/ч . Весь путь составил 96 км. Сколько времени велосипедист ехал первую часть пути?

Answer 1

15*4=60 96-60=36 36/12=3 Ответ: велосипедист ехал 1 часть 3 часа

Answer 2

1) 15.4=60 (км) - остальной путь.
2) 96-60=36 (км) - первая часть пути.
3) 36: 12= 3 (часа)
Ответ: 3 часа велосипедист ехал первую часть пути.

Answer 3

Calculation of the Time for the First Part of the Journey

To find out how much time the cyclist spent on the first part of the journey, we can use the formula:

Time = Distance / Speed

Let's denote the time spent on the first part of the journey as T1, the speed during the first part as S1, and the distance covered during the first part as D1.

We are given the following information: - The cyclist traveled for several hours at a speed of 12 km/h. - The remaining distance was covered in 4 hours at a speed of 15 km/h. - The total distance covered was 96 km.

From this information, we can set up the following equations:

T1 * S1 = D1 (equation 1) 4 * 15 = 96 - D1 (equation 2)

We can solve equation 2 for D1:

D1 = 96 - 4 * 15 = 96 - 60 = 36 km

Now, we can substitute the value of D1 into equation 1 and solve for T1:

T1 * 12 = 36 T1 = 36 / 12 = 3 hours

Therefore, the cyclist spent 3 hours on the first part of the journey.