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a person travels two parts of the total distance in the ration 2:1 with constant speeds of 30km/hr and 40km/hr respectively.what is the average speed of the journey?
Let the total distance traveled be 3x km
average speed = total distance/total time
=[(3x)/(2x/30+ x/40)] km/hr
=[(3)/(0.067+ 0.025)] km/hr
=[(3/0.092)] km/hr
=32.608 km/hr



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