4. A delivery truck leaves a warehouse and travels north to factory A. From factory A the truck travels east to factory B and then return directly to the warehouse (see figure). The driver records the truck’s odometer reading at the warehouse at both the beginning and the end of the trip and also at factory B, but forgot to record it at factory A (see table). The driver does recall that it was further from the warehouse to factory A than it was from factory A to factory B. Since delivery charges are based on distance from the warehouse, the driver needs to know how factory A is from the warehouse. Find this distance.
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