Question

От дачи до города 90 км. В 7 ч утра с дачи выехал мотоциклист, сделав в пути две десятиминутные остановки он прибыл в город в 9 ч 20 мин. Рассчитайте скорость мотоциклиста

Answer 1

Вычислим время в пути
9 ч 20мин-7ч=2 ч 20 мин
Две остановки по 10 мин
10 мин+10 мин=20 мин
2 ч 20 мин-20 мин=2 (ч)

Вычислим скорость 
S=V*t
V=S:t
V=90:2=45 (км/ч)

Ответ:45 км/ч скорость мотоциклиста

Answer 2

Calculating the Speed of the Motorcyclist

To calculate the speed of the motorcyclist, we can use the formula:

Speed = Distance / Time

Given: - Distance from the dacha to the city = 90 km - Departure time from the dacha = 7:00 AM - Arrival time in the city = 9:20 AM - Two 10-minute stops during the journey

Calculating the Total Travel Time

The total travel time can be calculated by subtracting the time of departure from the time of arrival, and then subtracting the time spent on the two 10-minute stops.

Departure time: 7:00 AM Arrival time: 9:20 AM Time spent on stops: 2 * 10 minutes

Total travel time = (Arrival time - Departure time) - (Time spent on stops)

Calculating the Speed

Now that we have the total travel time, we can use the formula to calculate the speed:

Speed = Distance / Total Travel Time

Let's calculate the total travel time and then the speed of the motorcyclist.