Question

Школьники во время каникул совершили поход. Весь путь составил 20 км. Первые 12 км двигались со скоростью 6км/ч и сделали превал на 3 часа, а потом шли со скоростью 5 км/ч. Сколько времени школьники были в походе?

Answer 1

12*6 = 72часа
5*8 = 40часа
40 + 72 + 3 = 115 часов
ответ 115 часов

Answer 2

Calculation of Time Spent on the Hike

To calculate the total time spent on the hike, we need to consider the two different speeds at which the students were walking and the time they spent on the uphill portion of the hike.

The students covered a total distance of 20 km during the hike. The first 12 km were covered at a speed of 6 km/h, and then they made an uphill climb that took 3 hours. After that, they continued walking at a speed of 5 km/h.

Let's break down the calculation step by step:

1. Calculate the time spent on the uphill portion of the hike: - The students covered a distance of 12 km at a speed of 6 km/h. - Using the formula `time = distance / speed`, we can calculate the time spent on the uphill portion as `12 km / 6 km/h = 2 hours`.

2. Calculate the remaining distance after the uphill portion: - The total distance of the hike was 20 km, and the students covered 12 km during the uphill portion. - Therefore, the remaining distance is `20 km - 12 km = 8 km`.

3. Calculate the time spent on the remaining distance: - The students covered the remaining 8 km at a speed of 5 km/h. - Using the formula `time = distance / speed`, we can calculate the time spent on the remaining distance as `8 km / 5 km/h = 1.6 hours`.

4. Calculate the total time spent on the hike: - The time spent on the uphill portion was 2 hours, and the time spent on the remaining distance was 1.6 hours. - Therefore, the total time spent on the hike was `2 hours + 1.6 hours = 3.6 hours`.

Answer: The students were in the hike for a total of 3.6 hours.

Please note that the above calculation assumes a constant speed throughout the hike and does not account for breaks or other factors that may have affected the actual time spent on the hike.