Question

Теплоход шёл по озеру 3 ч со скоростью 27 км/ч, а потом 4 ч по реке,впадающей в это озеро. Найдите весь путь,который прошёл теплоход за эти 7 ч,если скорость течение реки 3 км/ч.

Answer 1

3*27=81 км по озеру

4*(27+3)=120 км по реке

81+120=201 км весь путь

Ответ 201

Answer 2

27*3=81км прошел теплоход по озеру
27-3=24км/ч скорость теплохода против течения реки
24*4=96км прошел теплоход по реке
81+96=177км прошел теплоход за все время

Answer 3

Calculation of the Total Distance Traveled by the Boat

To calculate the total distance traveled by the boat, we need to consider the time it spent traveling on the lake and the time it spent traveling on the river.

The boat traveled on the lake for 3 hours at a speed of 27 km/h. Therefore, the distance traveled on the lake can be calculated using the formula:

Distance = Speed × Time

Substituting the given values, we have:

Distance on the lake = 27 km/h × 3 hours = 81 km.

Next, the boat traveled on the river for 4 hours. However, we need to take into account the speed of the river current, which is given as 3 km/h. Since the boat is traveling against the current, its effective speed will be reduced by the speed of the current.

To calculate the effective speed of the boat on the river, we subtract the speed of the current from the boat's speed:

Effective speed on the river = Boat's speed - Speed of the current

Substituting the given values, we have:

Effective speed on the river = 27 km/h - 3 km/h = 24 km/h.

Now, we can calculate the distance traveled on the river using the effective speed and the time:

Distance on the river = Effective speed × Time

Substituting the given values, we have:

Distance on the river = 24 km/h × 4 hours = 96 km.

Finally, to find the total distance traveled by the boat, we add the distance traveled on the lake and the distance traveled on the river:

Total distance = Distance on the lake + Distance on the river

Substituting the calculated values, we have:

Total distance = 81 km + 96 km = 177 km.

Therefore, the boat traveled a total distance of 177 kilometers during the 7-hour journey