A car is travelling at a uniform speed. The driver sees a milestone showing a 2-digit number. After travelling for an hour the driver sees another milestone with the same digits in reverse order. After another hour the driver sees another milestone containing the same two digits. What is the average speed of the driver.

• Avg. speed should be equal to the uniform speed (S)
  as the speed is uniform(S) so the distance travelled in 1 hr is same in between the three milestones .
  averg speed =total dist/total time
  =(Skph*1hr + Skph*1hr )/2hr
  =Skph
  
• 10 years agoHelpfull: Yes(3) No(1)