A car travels 30 km at a uniform speed of 50 km/hr and the next 30 km at 60 km/hr. Calculate (a) the time taken in the entire journey. (b) the average speed for the entire journey.
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average speed of car is 45
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The time taken is: ⇒T=75min.
A car travels first 30 km with a uniform speed of 60kmh−1and then next 30 km with a uniform speed of 40kmh−1.
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