A motorist travel to a place 150 km away at an average speed of 60 km/hr and returns at 30 km/hr.His average speed for the whole journey in km/hr is Answers
A) 36 km/hr	B) 37 km/hr	C) 40 km/hr	D) 44 km/hr	E) None of these
Explanation:   Average speed will be   2xy/x+y km/hr   = {2(60)(30)}/{60+30} km/hr   = 40 km/hr   Answer: Option 40 km/hr
<result>C</result>
A motorist travel to a place 150 km away at an average speed of 60 km/hr and returns at 30 km/hr.His average speed for the whole journey in km/hr is