The distance between the two marinas the boat sails on the lake in 2 hours, and the raft sails along the river

| September 4, 2021 | education

The distance between the two marinas the boat sails on the lake in 2 hours, and the raft sails along the river the same distance in 6 hours. in how many hours will the boat sail the distance between these marinas upstream of the river?

Let us denote the distance between the marinas by the letter S, the speed of the river by the letter v, and the speed of the boat by the letter V.
By the condition of the problem, we get:
S = 6 * v,
S = 2 * V, therefore:
6 * v = 2 * V,
V = 3 * v.
The speed of the boat is 3 times the speed of the river, which means that the boat will move against the current at a speed
3 * v – v = 2 * v.
Thus, if the raft sailed at a speed of v for 6 hours, then at a speed of 2 * v the boat will cover this distance in
6: 2 = 3 hours.
Answer: 3 hours.



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