Question

Собственная скорость лодки 6,2 км/ч,а скорость течения реки 2,2 км/ч. Сначала лодка прошла 1,4 ч,против течения, а затем 0,8ч по течению. Какой путь лодка прошла за всё время?

Answer 1

1)(6,2+2,2)×0,8=6,72км-плыл по течению
2)(6,2-2,2)×1,4=5,6км-плыл по течению
3)6,72+5,6=12,32км-плыл всего

Answer 2

Calculation of the Distance Traveled by the Boat

To calculate the distance traveled by the boat, we need to consider the time it spent traveling against the current and the time it spent traveling with the current.

Given: - Boat's own speed: 6.2 km/h - River's current speed: 2.2 km/h - Time spent traveling against the current: 1.4 hours - Time spent traveling with the current: 0.8 hours

To calculate the distance traveled against the current, we can use the formula:

Distance = Speed × Time

The boat's speed against the current is the difference between its own speed and the current speed:

Boat's speed against the current = Boat's own speed - River's current speed

Substituting the given values:

Boat's speed against the current = 6.2 km/h - 2.2 km/h = 4 km/h

Now, we can calculate the distance traveled against the current:

Distance traveled against the current = Boat's speed against the current × Time spent traveling against the current

Substituting the given values:

Distance traveled against the current = 4 km/h × 1.4 hours = 5.6 km

To calculate the distance traveled with the current, we can use the same formula:

Distance traveled with the current = Boat's speed with the current × Time spent traveling with the current

The boat's speed with the current is the sum of its own speed and the current speed:

Boat's speed with the current = Boat's own speed + River's current speed

Substituting the given values:

Boat's speed with the current = 6.2 km/h + 2.2 km/h = 8.4 km/h

Now, we can calculate the distance traveled with the current:

Distance traveled with the current = Boat's speed with the current × Time spent traveling with the current

Substituting the given values:

Distance traveled with the current = 8.4 km/h × 0.8 hours = 6.72 km

Finally, to calculate the total distance traveled by the boat, we can add the distances traveled against the current and with the current:

Total distance traveled = Distance traveled against the current + Distance traveled with the current

Substituting the calculated values:

Total distance traveled = 5.6 km + 6.72 km = 12.32 km

Therefore, the boat traveled a total distance of 12.32 km during the given time.