Question

Катер плыл по течению 2,5 ч а против течения 0,8 ч какой путь преодолел катер за всё это время если собственная скорость катера 40 км/ч а скорость течения 2,2 км/ч

Answer 1

Используя формулу: S=Vt (расстояние равно произведению скорости на время в пути),  и учитывая скорость движения катера по /против течения: S=(V(собств.)+ V(теч.реки))*2.,5ч,  и  S=(V(собств.)-V(теч. реки))* 0.8, находим:

1) (40+2.2)*2.5=105,5 км проплыл катер по течению реки;

2) (40 -2.2)*0,8=30,24км проплыл катер против течения реки;

3)105,5+30,24=135,74км весь путь который проплыл катер.

Ответ:катер преодолел путь в 135,74км.

Answer 2

1) 2.5 * (40+2.2) = 105.5(км) по течению

2) 0.8*(40-2.2) = 30.24(км) против течения

3) 105.5 + 30.24 = 135.74 (км)

Ответ: 135.74 км.

Answer 3

Problem Analysis

We are given the following information: - The boat is traveling downstream for 2.5 hours. - The boat is traveling upstream against the current for 0.8 hours. - The boat's own speed is 40 km/h. - The speed of the current is 2.2 km/h.

We need to calculate the total distance covered by the boat during this time.

Downstream Calculation

When the boat is traveling downstream, its effective speed is the sum of its own speed and the speed of the current. Therefore, the boat's effective speed is 40 km/h + 2.2 km/h = 42.2 km/h.

To calculate the distance covered downstream, we can use the formula: distance = speed × time.

Substituting the values, we get: distance downstream = 42.2 km/h × 2.5 hours = 105.5 km.

Upstream Calculation

When the boat is traveling upstream against the current, its effective speed is the difference between its own speed and the speed of the current. Therefore, the boat's effective speed is 40 km/h - 2.2 km/h = 37.8 km/h.

To calculate the distance covered upstream, we can again use the formula: distance = speed × time.

Substituting the values, we get: distance upstream = 37.8 km/h × 0.8 hours = 30.24 km.

Total Distance Covered

The total distance covered by the boat is the sum of the distances covered downstream and upstream. Therefore, the total distance covered is 105.5 km + 30.24 km = 135.74 km.

So, the boat covered a total distance of 135.74 km during this time.

Answer

The boat covered a total distance of 135.74 km during this time.