Question

Моторная лодка,собственная скорость которой 9,8 км/ч,шла 2 ч по течению 3ч против течения реки.Скорость течения реки 2,2 км/ч.Какой путь прошла моторная лодка за эти 5 ч?

Answer 1

2=3=5(ч)

9.8*5=49(км)

2.2*2=4.4(км)

2.2*3=6.6(км)

49+4.4-6.6=46.8(км)

Ответ:46.8 км

Answer 2

отметим V1 как скорость по течению реки

V1 = vс + vp

V1 = 9.8 + 2.2  =  12 км/ч

V2 - скорость против течения реки

V2 = 9.8 - 2.2 = 7.6 км/ч

тогда S1 пусть который лодка прошла по течению реки:

S1 = 2 * 12 = 24 км

S2 против течения

S2 = 3 * 7,6 = 22,8 км

весь путь равен: S1 + S2 = 24 + 22.8 = 46.8 км

Answer 3

Calculation of the Distance Traveled by the Motorboat

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

Given information: - Speed of the motorboat: 9.8 km/h - Time spent traveling with the current: 2 hours - Time spent traveling against the current: 3 hours - Speed of the river current: 2.2 km/h

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

Distance = Speed × Time

Distance traveled with the current = (Speed of the motorboat + Speed of the river current) × Time spent traveling with the current

Distance traveled with the current = (9.8 km/h + 2.2 km/h) × 2 hours

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

Distance traveled against the current = (Speed of the motorboat - Speed of the river current) × Time spent traveling against the current

Distance traveled against the current = (9.8 km/h - 2.2 km/h) × 3 hours

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

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

Let's calculate the distances:

Distance traveled with the current = (9.8 km/h + 2.2 km/h) × 2 hours = 12 km/h × 2 hours = 24 km

Distance traveled against the current = (9.8 km/h - 2.2 km/h) × 3 hours = 7.6 km/h × 3 hours = 22.8 km

Total distance traveled = 24 km + 22.8 km = 46.8 km

Therefore, the motorboat traveled a total distance of 46.8 km in 5 hours.