\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
A car travels at a constant velocity. At 1:00 PM, its position is \(A(15, 20)\). At 1:30 PM, its position is \(B(55, -10)\). Distances are measured in kilometres.
  1. Find the velocity vector of the car in km/h.
  2. Find the speed of the car in km/h.

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