The odometer of the car reads 2000 km at the start of the trip and 2400 km at the end of the trip. If the trip took 8 h, calculate the average speed of the car in kmh−1 and ms−1.
A. 50 km/h or 13.9 m/s
B. 40 km/h or 12.5 m/s
C. 50 km/h or 12.5 m/s
D. 40 km/h or 13.9 m/s
Answer:
A. 50 km/h or 13.9 m/s
Explanation:
It is given that the total distance traveled by car is 2400 km-2000 km = 400 km, that is, 400000 m, and the total time taken =8 hours, that is, 8×60×60=28800seconds.
Average speed in km/hr = total distance/total time = 400/8 = 50 km/hr.
Average speed in m/s = total distance/total time = 400000/28800 = 13.89 m/s.
The odometer of a car reads 2000 km
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