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25-02-2024
Mathematics

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A car covers four successive 3 km stretches at speeds of 10 km/hr, 20 km/hr, 30 km/hr and 60 km/hr respectively. The average speed of the car for entire journey is
A) 15 km/hr
B) 35 km/hr
C) 20 km/hr
D) 25 km/hr

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