Question

Теплоход шел по течению реки 2 часа со скоростью 33,5 км/ч а затем 3 часа против течения. Найдите путь пройденный теплоходом если скорость течения 3,1 км/ч

Answer 1

33,5+3,1=33,6 ( скорость по течению)33,5 - 3,1 = 30.4 (скорость против течения)33,6*2 +30,4 *3 = 164,4
Ответ :164,4 км

Answer 2

Problem Analysis

The problem involves a boat traveling downstream for 2 hours at a speed of 33.5 km/h and then traveling upstream for 3 hours. We need to find the distance traveled by the boat given that the speed of the current is 3.1 km/h.

Solution

To solve this problem, we can use the formula: Distance = Speed × Time

First, let's calculate the distance traveled downstream and upstream separately.

Downstream Distance

The speed of the boat relative to the water when traveling downstream is the sum of the boat's speed and the speed of the current. So, the speed of the boat downstream = 33.5 km/h + 3.1 km/h = 36.6 km/h.

Using the formula, the distance traveled downstream = 36.6 km/h × 2 h.

Upstream Distance

When traveling upstream, the speed of the boat relative to the water is the difference between the boat's speed and the speed of the current. So, the speed of the boat upstream = 33.5 km/h - 3.1 km/h = 30.4 km/h.

Using the formula, the distance traveled upstream = 30.4 km/h × 3 h.

Total Distance

The total distance traveled by the boat is the sum of the distances traveled downstream and upstream.

Calculation

Let's calculate the distances traveled downstream and upstream using the given values.

Downstream Distance: 36.6 km/h × 2 h = 73.2 km

Upstream Distance: 30.4 km/h × 3 h = 91.2 km

Total Distance: 73.2 km + 91.2 km = 164.4 km

So, the boat traveled a total distance of 164.4 km.

Conclusion

The boat traveled a total distance of 164.4 km.