A motorist travel to a place 150 km away at an average speed of 50 km/hr and returns ar 30 km/hr.His average speed for the whole journey in km/hr is:
A.36.5 km/hr
B.37.5 km/hr
C.35.5 km/hr
D.34.5 km/hr
Answer:B
A motorist travel to a place 150 km away at an average speed of 50 km/hr and returns ar 30 km/hr.His average speed for the whole journey in km/hr is:
A.36.5 km/hr B.37.5 km/hr C.35.5 km/hr D.34.5 km/hr