Question

A boat moves at a speed of 15 km/h in still water. The river it is traveling in flows at a rate of 3 km/h downstream. What is the velocity of the boat if it travels downstream? What is the velocity of the boat if it travels upstream?

V1 = 15 + 3 = 18 km/h.

V2 = 15 - 3 = 12 km/h.
15+3=18km/h
15-3=12km/h

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