A car driver travels from the plains to the hill station, which are 200 km apart at an average speed of 40km/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 Select
A) 8.95km/hr B) 26.7km/hr C) 27.8km/hr D) 37.9km/hr E) 8.45km/hr
average speed = (2*40*20)/40+20 km/hr   =(1600/60)km/hr =26.7 km/hr   Answer (26.7km/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 40km/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