1. Tardigrade
  2. Question
  3. Physics
  4. A bus travelling the first one third distance at a speed of 10 km/h, the next one third at 20 km/h and the last one-third at 60 km/h. The average speed (in km/h) of the bus is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A bus travelling the first one third distance at a speed of $10 \,km/h$, the next one third at $20 \,km/h$ and the last one-third at $60 \,km/h$. The average speed (in km/h) of the bus is

Motion in a Straight Line

Solution:

Average speed $= \frac{s}{\frac{s/3}{10}+\frac{s/3}{20} +\frac{s/3}{6}} $
$= \frac{s}{s/18} = 18 km/h$