A boat is crossing the river, keeping a course perpendicular to the river flow. The boat speed is 4 m / s, the river speed is 3 m / s.

A boat is crossing the river, keeping a course perpendicular to the river flow. The boat speed is 4 m / s, the river speed is 3 m / s. What is the width of the river if the boat is blown 60 m downstream?

V1 = 4 m / s V2 = 3 m / s L = 60 m
h -?
t1 = t2
h / V1 = L / V2
h = L * V1 / V2 = 60 * 4/3 = 80 m
V1 = 4 m / s V2 = 3 m / s L = 60 m
h -?
t1 = t2
h / V1 = L / V2
h = L * V1 / V2 = 60 * 4/3 = 80 m



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