Question

Отряд партизан,выполняя боевое задание,прошёл 32,4 км.первые 4,5ч они шли по дороге со скоростью 5,2 км/ч и сделали привал на 1,6 ч, а остальное время они шли по болотистой местности со скоростью 2,5 км/ч. сколько времени партизаны затратили на весь переход?

Answer 1

1)5,2×4,5=23,4(км)
2)32,4-23,4=9(км)
3)9:2,5=3,6(час)
4)4,5+1,6+3,6=9,7(час)

Answer 2

Calculation of Time Spent by Partisans on the Entire Journey

To calculate the time spent by the partisans on the entire journey, we need to consider the different speeds at which they traveled on the road and in the marshy terrain.

The partisans traveled a total distance of 32.4 km. For the first 4.5 hours, they traveled on the road at a speed of 5.2 km/h. They then took a break for 1.6 hours before continuing the journey through the marshy terrain at a speed of 2.5 km/h.

To calculate the time spent on the road, we can use the formula:

Time = Distance / Speed

For the time spent on the road: - Distance = 5.2 km/h * 4.5 h = 23.4 km

To calculate the time spent in the marshy terrain, we can use the same formula:

Time = Distance / Speed

For the time spent in the marshy terrain: - Distance = 32.4 km - 23.4 km = 9 km

Now we can calculate the time spent in the marshy terrain: - Time = 9 km / 2.5 km/h = 3.6 hours

To calculate the total time spent on the entire journey, we add the time spent on the road and the time spent in the marshy terrain:

Total Time = Time on Road + Time in Marshy Terrain

Total Time = 4.5 hours + 1.6 hours + 3.6 hours = 9.7 hours

Therefore, the partisans spent approximately 9.7 hours on the entire journey.