River water flows at 40 km/h. In this river a fisherman tries to drive a motorboat at 30 km/h perpendicular to the bank of the river . Find the resultant velocity of the motorboat and its direction with respect to the bank.
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What is the resultant speed of the boat?" The phrase "boat is rowed at 8 km/h" means that the speedometer of the boat measures the boat's speed relative to the water, so that if there is no current the boat's speed relative to the riverbank will be 8 km/h.
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