Question

Расстояние от посёлка до озера 12 км. от посёлка до озера турист проходил за каждый час 4 км, а на обратном пути- 6 км за каждый час.в котором часу нужно выйти туристу из дома, чтобы к 15 часам дня вернуться?

Answer 1

12 :4=3 ч к озеру 
12 : 6 =2 ч обратно
3 +2 =5 ч на весь путь
15 - 5 =10 часов
Ответ в 10 ч

Answer 2

1) 12:4=3(ч.) шел турист от поселка до озера.
2) 12:6=2(ч.) шел турист от озера до поселка.
3) 3+2=5(ч.) турист шел всего.
4) 15-5=10(ч.)
Ответ: в 10 часов.

Answer 3

Calculation of the Time Needed to Return to the Village

To calculate the time needed for the tourist to return to the village by 15:00, we need to determine the total distance traveled and the average speed.

Given: - Distance from the village to the lake: 12 km - Speed on the way to the lake: 4 km/h - Speed on the way back from the lake: 6 km/h

To find the total distance traveled, we can add the distance traveled on the way to the lake and the distance traveled on the way back:

Total distance = Distance to the lake + Distance back from the lake Total distance = 12 km + 12 km Total distance = 24 km

To find the average speed, we can use the formula:

Average speed = Total distance / Total time

Let's assume the total time taken to reach the lake is 'x' hours. Since the speed on the way to the lake is 4 km/h, the time taken to reach the lake can be calculated as:

Time taken to reach the lake = Distance to the lake / Speed on the way to the lake Time taken to reach the lake = 12 km / 4 km/h Time taken to reach the lake = 3 hours

Similarly, the time taken to return from the lake can be calculated as:

Time taken to return from the lake = Distance back from the lake / Speed on the way back Time taken to return from the lake = 12 km / 6 km/h Time taken to return from the lake = 2 hours

The total time taken for the round trip can be calculated as:

Total time = Time taken to reach the lake + Time taken to return from the lake Total time = 3 hours + 2 hours Total time = 5 hours

To find the time the tourist needs to leave the house in order to return by 15:00, we subtract the total time from the desired return time:

Time to leave the house = Desired return time - Total time Time to leave the house = 15:00 - 5 hours Time to leave the house = 10:00

Therefore, the tourist needs to leave the house at 10:00 in order to return to the village by 15:00.

Note: The calculations assume a constant speed throughout the journey and do not account for breaks or other factors that may affect the travel time.

Answer:

The tourist needs to leave the house at 10:00 in order to return to the village by 15:00.