A child is in danger of drowning in the Merimac river. The Merimac river has a current of3.1 km/hrto the east. The child is0.6 kmfrom the shore and2.5 kmupstream from the dock. A rescue boat with speed24.8 km/hr(with respect to the water) sets off from the dock at the optimum angle to reach the child as fast as possible. How far from the dock does the boat reach the child?
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