# You are in a speedboat on a river moving in the same direction as the current. The speedometer on the boat shows its speed is 20 km/h. However, a person on the shore measures the boat's speed as 23 km/h. How is this possible?

Mar 22, 2017

If the boat was running against the current then the speeds would have to be subtracted, so although the meter would show $20$ the actual speed measured my a man on the shore would be $20 - 3 = 17$