Question

Двигаясь по течению реки,за 4 часа баржа прошла 48 км.Определите собственную скорость баржи,если скорость течения-2км/ч

Answer 1

S=Vc+Vр умножить на t
Vc=S:t-Vр
Vc=48:4-2
Vc=10
Ответ:10 км/ч

Answer 2

Calculation of the Barge's Speed

To determine the speed of the barge, we need to consider the speed of the current and the distance traveled by the barge.

Given: - Time taken by the barge: 4 hours - Distance traveled by the barge: 48 km - Speed of the current: 2 km/h

To calculate the speed of the barge, we can use the formula:

Speed = Distance / Time

In this case, the distance traveled by the barge is the effective distance, considering the speed of the current. So, the effective distance can be calculated by subtracting the distance covered by the current from the total distance traveled by the barge.

The distance covered by the current can be calculated using the formula:

Distance covered by the current = Speed of the current * Time

Let's calculate the speed of the barge step by step:

1. Calculate the distance covered by the current: - Speed of the current: 2 km/h - Time: 4 hours

Distance covered by the current = 2 km/h * 4 hours = 8 km

2. Calculate the effective distance traveled by the barge: - Total distance traveled by the barge: 48 km - Distance covered by the current: 8 km

Effective distance traveled by the barge = 48 km - 8 km = 40 km

3. Calculate the speed of the barge: - Effective distance traveled by the barge: 40 km - Time taken by the barge: 4 hours

Speed of the barge = 40 km / 4 hours = 10 km/h

Therefore, the speed of the barge is 10 km/h.