Question

Туристы отправились из города к водопаду. Первые 8 км они прошли со скоростью 5 км/ч, а оставшиеся 4 км - со скоростью 4 км/ч. Сколько времени туристы добирались до водопада?

Answer 1

1)8:5=1.6
2)4:4=1
3)1.6+1=2.6

Answer 2

Calculation of Time Taken to Reach the Waterfall

To calculate the time taken by the tourists to reach the waterfall, we need to consider the distances covered at different speeds.

The tourists first covered a distance of 8 km at a speed of 5 km/h. To find the time taken for this part of the journey, we can use the formula:

Time = Distance / Speed

For the first part of the journey: Distance = 8 km Speed = 5 km/h

Time taken for the first part = 8 km / 5 km/h = 1.6 hours

Next, the tourists covered a remaining distance of 4 km at a speed of 4 km/h. Using the same formula:

For the second part of the journey: Distance = 4 km Speed = 4 km/h

Time taken for the second part = 4 km / 4 km/h = 1 hour

To find the total time taken, we add the times taken for both parts of the journey:

Total time taken = Time taken for the first part + Time taken for the second part

Total time taken = 1.6 hours + 1 hour = 2.6 hours

Therefore, the tourists took approximately 2.6 hours to reach the waterfall.

Please note that the above calculation assumes a constant speed throughout each part of the journey and does not account for any breaks or variations in speed.