An odometer of a car reads 4200 km at the start of a trip and 4460 km at the end of a trip. If Rajiv took 4 hours 20 minutes to complete the trip.Then find the average speed and average velocity in kilometre per hour as well as in metre per second.

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Solution

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▶At the starting of the journey odometer read = 4200 km

▶At the end of the trip = 4460 km

▶Therfore, length of the journey = 4460-4200 =260 km

time = 4h 20min = 4h + 1/3 h =4.6 h

average speed in km/hr = 260 / 4.6 = 56.5 km/hr

distance = 260 km = 260000 m

time = 4h 20 min = 14400 + 1200 = 15600 s

▶▶▶Average speed in m/s = 260000/15600 = 16.66 m/s

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