A car is driving along a road 13 kilometers long at a speed of . Sometime along the track the car stops, takes a 15 minute break then keeps driving at a speed of . The car starts driving at 3:12 , and arrives at the end of the road at 3:38 .
If the car repeated the same drive 3 times, but had values of 1, 2, and 3, how will the speed change?
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