1.

Dheeraj travelled for 2 hours at an average speed of 48 kmph and travelled for another 2 hours at an average speed of 52 kmph . What is the average speed? (in kmph)

Answer»

50 km



As the duration of journey at different speeds is constant, the AVERAGE speed of the journey is average of the speeds. 
i.e. (48 + 52)/2 = 50 kmph.



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