Question

Praful travels from P to Q at a speed of 50 km/hr and Q to P at a speed of 30 km/hr. Find the average speed for the whole journey?

• A. 35 km/hr
• B. 37.5 km/hr
• C. 40 km/hr
• D. 42 km/hr

Answer 1

Answer:

B. 37.5 km/hr

Read Explanation:

x=50 y=30 average speed=2xy/(x+y) =(2x50x30)/(50+30) = 37.5 km/hr

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