A car travels with the speed of 40km/h from a city A to the city B and returns back with
a speed 60km/h. Calculate () the average speed of car (ii) average velocity of car.
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Explanation:
Speed of car in first 15 minutes = 40 km/h
Distance covered = speed × Time taken
60 minutes = 1 hour
15 minutes = 6015 hour
Distance covered = 240×6015=10km
Speed of car in next 15 minutes = 60 km/h
Distance covered = 60×6015=15km
∴ Total distance covered = (10+15)km = 25 km
∴ 25 km is correct
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Answer:
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