while arriving raj travellers 30 km with a uniform speed of 40 km/hr and next 30 km with a uniform speed of km/hr find his average speed.
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The total time for the journey is given as,
t=d1/v1+d2/v2
=30/40 + 30/20
=2.25hour
=2.25hourThe average speed is given as,
v avg =d1 +d2/t
=30+30/2.25
26.67 km/hr.
Thus, the average speed of the car is 26.67km/h.
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