Multiple choice

A man went from home to office at a speed of 40 km/hr. and came back with a speed of 60 km/hr. Find his average speed during the whole journey?

  1. 37km/hr

  2. 67km/hr

  3. 68km/hr

  4. 57km/hr

  5. None of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Average speed = 2xy/(x+y) where x=40 km/hr, y=60 km/hr. Average = (2 × 40 × 60)/(40+60) = 4800/100 = 48 km/hr. None of the options (37, 67, 68, 57) match 48.

Keep practicing — related questions