Question

Теплоход 3ч шёл по озеру со скоростью 23км/ч, а потом 4ч по реке. сколько километров прошёл теплоход за эти 7ч если по реке он шёл на 3км/ч быстрее, чем по озеру

Answer 1

1) 3*23=69 км - путь по озеру
2) 23+3=26 км/ч - скорость по реке
3) 26*4=104 км - путь по реке
4) 104+69=173 км - весь путь
Ответ 173 км

Answer 2

Calculation of Distance Traveled by the Boat

To calculate the distance traveled by the boat in 7 hours, we need to consider two different segments: the time spent on the lake and the time spent on the river.

1. Time spent on the lake: The boat traveled for 3 hours on the lake at a speed of 23 km/h. 2. Time spent on the river: The boat traveled for 4 hours on the river at a speed that is 3 km/h faster than its speed on the lake.

To calculate the distance traveled on the lake, we can use the formula: distance = speed × time. Therefore, the distance traveled on the lake is 23 km/h × 3 hours = 69 km.

To calculate the distance traveled on the river, we need to consider that the boat's speed on the river is 3 km/h faster than its speed on the lake. Therefore, the speed on the river is 23 km/h + 3 km/h = 26 km/h.

Using the same formula, the distance traveled on the river is 26 km/h × 4 hours = 104 km.

To find the total distance traveled by the boat in 7 hours, we add the distances traveled on the lake and the river: 69 km + 104 km = 173 km.

Therefore, the boat traveled a total distance of 173 kilometers in 7 hours.

Conclusion

The boat traveled a total distance of 173 kilometers in 7 hours, with 69 kilometers on the lake and 104 kilometers on the river.