Question

Туристы плыли 4,5ч на плоту а затем 1,5ч на байдарке.скорость течения реки 2км/ч а скорость байдарки в стоячей воде 20км/ч.какое расстояние проплыли туристы?

Answer 1

S=vt  когда плыли на плоту s=2*4,5=9 км   когда плыли на байдарке s=1,5*22=33 км. в итоге 9+33=42 км - всего расстояние

Answer 2

1) 4,5*2 = 9 км - проплыли на плоту (плот движется со скоростью реки) 

2) 1,5*(2+20) = 33 км - проплыли на байдарке

3) 9+33 = 42 км - проплыли всего

Ответ: 42км проплыли туристы

Answer 3

Calculation of the Distance Traveled by Tourists

To calculate the distance traveled by the tourists, we need to consider the time spent on the raft and the time spent on the kayak, as well as the speeds of the current and the kayak.

Given: - Time spent on the raft: 4.5 hours - Time spent on the kayak: 1.5 hours - Speed of the river current: 2 km/h - Speed of the kayak in still water: 20 km/h

To calculate the distance traveled on the raft, we can use the formula:

Distance = Speed × Time

The speed of the raft is the sum of the speed of the current and the speed of the kayak in still water:

Speed of the raft = Speed of the current + Speed of the kayak

Let's calculate the distance traveled on the raft first:

Distance on the raft = (Speed of the current + Speed of the kayak) × Time spent on the raft

Substituting the given values:

Distance on the raft = (2 km/h + 20 km/h) × 4.5 hours

Calculating the distance on the raft:

Distance on the raft = 22 km/h × 4.5 hours

Now, let's calculate the distance traveled on the kayak:

Distance on the kayak = Speed of the kayak × Time spent on the kayak

Substituting the given values:

Distance on the kayak = 20 km/h × 1.5 hours

Calculating the distance on the kayak:

Distance on the kayak = 30 km

Finally, to find the total distance traveled by the tourists, we add the distance on the raft and the distance on the kayak:

Total distance traveled = Distance on the raft + Distance on the kayak

Substituting the calculated values:

Total distance traveled = 22 km + 30 km

Calculating the total distance traveled:

Total distance traveled = 52 km

Therefore, the tourists traveled a total distance of 52 kilometers.