Question 8A man rows a boat upstream. When he passes bridge A, at 11:30, his hat falls into the river and isswept downstream, but he does not notice and continues rowing. When he gets to bridge B, 10 kmfrom 4, at 12:00 o'clock, he notices his hat missing, turns around and catches up with it at point C,5 km downstream from A.5 kmd. 5 km/h10 kmdownstreamThe speed of the boat relative to the river is constant. You can also assume that the hat isdrifted by the river from the moment it falls into the water, so it moves with the same constantvelocity as the water.What is the speed of the river relative to the ground?a. 2.5 km/hb. 30 km/he. 15 km/hc. 25 km/hf. 10 km/h

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A man rows a boat upstream. When he passes bridge A, at 11:30, his hat falls into the river and is swept downstream, but he does not notice and continues rowing. When he gets to bridge B, 10 km from A, at 12:00 o'clock, he notices his hat missing, turns around and catches up with it at point C, 5 km downstream from A. 5 km 10 km downstream С A B The speed of the boat relative to the river is constant. You can also assume that the hat is drifted by the river from the moment it falls into the water, so it moves with the same constant velocity as the water. What is the speed of the river relative to the ground?

A man rows a boat upstream. When he passes bridge A, at 11:30, his hat falls into the river and is swept downstream, but he does not notice and continues rowing. When he gets to bridge B, 10 km from A, at 12:00 o'clock, he notices his hat missing, turns around and catches up with it at point C, 5 km downstream from A. 5 km 10 km downstream С A B The speed of the boat relative to the river is constant. You can also assume that the hat is drifted by the river from the moment it falls into the water, so it moves with the same constant velocity as the water. What is the speed of the river relative to the ground?