A car driver travels from the plains to the hill station, which are 200 km apart at an average speed of 25km/hr. in return trip, he covers the same distance at an average speed of 20km/hr. the average speed of the car over the entire distance of 400 km is	Choose one:
A) 8.95km/hr
B) 22.2km/hr
C) 27.8km/hr
D) 37.9km/hr
E) 8.45km/hr
average speed = (2*25*20)/25+20 km/hr   =22.22 km/hr   Answer (22.2km/hr)
<result>B</result>
A car driver travels from the plains to the hill station, which are 200 km apart at an average speed of 25km/hr. in return trip, he covers the same distance at an average speed of 20km/hr. the average speed of the car over the entire distance of 400 km is