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    				| 1. | Example 8.2 The odometer of a car reads2000 km at the start of a trip and2400 km at the end of the trip. If thetrip took 8 h, calculate the averagespeed of the car in km hl and ms- | 
| Answer» Time = 8 hrsavg speed= distance/time.distance=400km.speed=400/8=50km/h.50km/h=50×5/18 m/s.speed=250/18 m/s. | |