Question

Теплоход шел по озеру 3 ч со скоростью 27 кмч ,а потом 4 ч по реке , впадающей в это озеро. Найдите весь путь, который прошел теплоход за эти 7 ч ,если скорость течения реки 3 кмч.

Answer 1

27*3=81 (км) - прошёл теплоход по озеру.
27-3=24 (км/ч) - скорость теплохода по реке против течения.
24*4=96 (км) - прошёл теплоход по реке.
81+96=177 (км) - всего.
ответ: за семь часов теплоход прошёл 177 километров.

Answer 2

3 *27= 81 км шел по озеру

27-3 = 24 км/ч скорость по реке

24*4=96 км по реке

81+96= 177 км всего прошел

Ответ: 177 км 

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 spent traveling on the lake and the time spent traveling on the river.

Given information: - The boat traveled on the lake for 3 hours at a speed of 27 km/h. - The boat then traveled on the river for 4 hours.

To calculate the distance traveled on the lake, we can use the formula:

Distance = Speed × Time

Substituting the given values, we have:

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

Next, we need to calculate the distance traveled on the river. However, we also need to take into account the speed of the river current, which is given as 3 km/h.

Since the boat is traveling upstream on the river, the effective speed of the boat will be reduced by the speed of the current. Therefore, the speed of the boat relative to the ground will be:

Boat speed relative to the ground = Boat speed - River current speed

Substituting the given values, we have:

Boat speed relative to the ground = 27 km/h - 3 km/h = 24 km/h

Using this relative speed, we can calculate the distance traveled on the river:

Distance on the river = Boat speed relative to the ground × Time

Substituting the given values, we have:

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

Finally, to calculate the total distance traveled by the boat, we add the distance on the lake and the distance 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 km during the 7-hour journey.