Question

собственная скорость моторной лодки 12,8 км/ч, а скорость течения реки 1,7 км/ч Какой путь пройдёт лодка по течению и против течения за 2,5 часа

Answer 1

По течению к скорости лодки прибавляется скорость течения реки,а против течения- отнимается.
Путь=Время пути*скорость
По течению:
(12.8+1.7)*2.5=36.25 км
Против течения:
(12.8-1.7)*2.5=27.75 км

Answer 2

Calculation of the Distance Traveled by the Boat

To calculate the distance traveled by the boat both with and against the current, we can use the formula:

Distance = Speed x Time

Given the following information: - Boat speed: 12.8 km/h - River current speed: 1.7 km/h - Time: 2.5 hours

We can calculate the distance traveled by the boat with the current using the formula:

Distance with current = (Boat speed + River current speed) x Time

Substituting the given values into the formula:

Distance with current = (12.8 km/h + 1.7 km/h) x 2.5 hours

Calculating the distance with the current:

Distance with current = 14.5 km/h x 2.5 hours

Distance with current = 36.25 km

Similarly, we can calculate the distance traveled by the boat against the current using the formula:

Distance against current = (Boat speed - River current speed) x Time

Substituting the given values into the formula:

Distance against current = (12.8 km/h - 1.7 km/h) x 2.5 hours

Calculating the distance against the current:

Distance against current = 11.1 km/h x 2.5 hours

Distance against current = 27.75 km

Therefore, the boat will travel approximately 36.25 km with the current and 27.75 km against the current in 2.5 hours.