Determine the speed of water flow in the Volga in the section where the speed of the cargo

| June 24, 2021 | education

Determine the speed of water flow in the Volga in the section where the speed of the cargo ship downstream is 600 km / h, and upstream – 336 km / day.

V (flow) = 600 km / h.
V (against the flow) = 336 km / day = 14 km / h.
V (tech) -?
The speed of the ship downstream V (downstream) is determined by the formula: V (downstream) = V + V (downstream), where V is the speed of the boat in still water, V (downstream) is the speed of the river.
V = V (flow) – V (flow).
The speed of the ship against the flow V (against the flow) is determined by the formula: V (flow) = V – V (flow), where V is the speed of the ship in still water, V (flow) is the speed of the river flow.
V = V (against flow) + V (flow).
V (flow) – V (flow) = V (counter flow) + V (flow).
V (flow) – V (counter flow) = 2 * V (flow).
V (flow) = (V (flow) – V (against flow)) / 2.
V (flow) = (600 km / h – 14 km / h) / 2 = 293 km / h.
Answer: the speed of the current V (flow) = 293 km / h.



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