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A driver travels to a place 150 km away at anaverage speed of 50 km/hr and return at30 km/hr. His average speed for the whole journeyin km/hr is |
Answer» <p>Average speed will be =2xy/(x+y)km/hr =2(50)(30)/(50+30)km/hr</p><p>= 37.5 km/hr</p> | |