Question

A person reached Delhi from Jaipur by his car at a speed of 60 km per hour and returned to Jaipur along the same route at a speed of 40 km per hour. What is his average speed?

• A. 50 km per hour
• B. 45 km per hour
• C. 48 km per hour
• D. 55.5 km per hour
• E. 23.33 km per hour
• F. None of the above

Answer 1

The correct option is C 48 km per hour

Average speed $=\frac{2xy}{x+y}=\frac{2\times 60\times 40}{60+40}$
=48 kmph