Question

Лодка по течению реки двигалалась- 4ч , и против течения-3ч .какой путь прошла лодка если она двигалась с обстаенной споростью 12км/ч,а скорость течения реки 3 км/ч

Answer 1

12+3=15( по течению реки скорость)
12-3=9( скорость против течения реки)
15*4=60( прошел по течению реки)
9*3=27( против течения реки прошел)
60+27=87( в общем)
Ответ 87 км

Answer 2

Calculation of Distance Traveled by the Boat

To calculate the distance traveled by the boat, we can use the formula:

Distance = Speed x Time

Let's calculate the distance traveled by the boat in each scenario.

1. Boat moving with the current: - Time = 4 hours - Speed of the boat = 12 km/h - Speed of the current = 3 km/h

Using the formula, we can calculate the distance traveled by the boat:

Distance = (Speed of the boat + Speed of the current) x Time

Distance = (12 km/h + 3 km/h) x 4 hours

Distance = 15 km/h x 4 hours

Distance = 60 km

Therefore, when the boat is moving with the current, it travels a distance of 60 km.

2. Boat moving against the current: - Time = 3 hours - Speed of the boat = 12 km/h - Speed of the current = 3 km/h

Using the formula, we can calculate the distance traveled by the boat:

Distance = (Speed of the boat - Speed of the current) x Time

Distance = (12 km/h - 3 km/h) x 3 hours

Distance = 9 km/h x 3 hours

Distance = 27 km

Therefore, when the boat is moving against the current, it travels a distance of 27 km.

Conclusion

In summary, when the boat is moving with the current, it travels a distance of 60 km, and when it is moving against the current, it travels a distance of 27 km.