A child in danger of drowning in a river is being downstream by a current that has a speed of 2.25 km/h. The child is 0.530km from shore and 0.825km upstream of a boat landing when a rescue boat sets out. If the boat proceeds at its maximum speed of 18.9km/hr relative to the water, what angle (in degrees) does the boat velocity make with the shore? How long does it take the boat to reach the child?