Question

A motorist travels to a place 150 km away at a speed of 50 km/hr and returns at 30 km/ hr. His average speed for the whole journey in km/hr is

• A. 37.5
• B. 37
• C. 35
• D. 40

Answer 1

Answer:

A. 37.5

Average speed = 2S1S2/(S1 + S2) S1 = 50 km/hr & S2 = 30 km/hr ⇒ 2 × 50 × 30/(50 + 30) ⇒ 3000/80 ⇒ 37.5 km/hr