Question

Велосипедисты всего проехали 79,2 км. Сначала они проехали 48,6 км со скоростью 12,15 км/ч. Потом у них был привал 1,5 ч. Потом они опять пошли со скоростью 15,3 км/ч. Сколько всего времени ехали велосипедисты?

Answer 1

Ехали 6 часов, а в пути были 7,5)))))))))))))

Answer 2

Calculation of Total Time

To calculate the total time the cyclists spent riding, we need to consider the distance they covered and the speeds at which they traveled.

The cyclists initially rode for 48.6 km at a speed of 12.15 km/h. Then they took a break for 1.5 hours. After the break, they continued riding at a speed of 15.3 km/h.

To calculate the time spent riding, we can divide the distance traveled by the speed at which they traveled.

The time spent riding for the first part of the journey can be calculated as follows:

Time1 = Distance1 / Speed1

Where: - Distance1 = 48.6 km - Speed1 = 12.15 km/h

Substituting the values, we get:

Time1 = 48.6 km / 12.15 km/h

To calculate the time spent riding after the break, we can use the same formula:

Time2 = Distance2 / Speed2

Where: - Distance2 = Total distance - Distance1 - Speed2 = 15.3 km/h

Substituting the values, we get:

Time2 = (Total distance - 48.6 km) / 15.3 km/h

Finally, we can calculate the total time spent riding by summing Time1 and Time2:

Total Time = Time1 + Time2

Let's calculate the values:

Time1 = 48.6 km / 12.15 km/h = 4 hours

Time2 = (79.2 km - 48.6 km) / 15.3 km/h = 2 hours

Total Time = 4 hours + 2 hours = 6 hours

Therefore, the cyclists spent a total of 6 hours riding.