Question

A walker follows the path from A to E as shown in the figure below, over a time interval of 80 s with a uniform speed.
What is the walker's average speed between B and D ?

• A. 16 m/s
• B. 8 m/s
• C. 2 m/s
• D. 1 m/s

Answer 1

The correct option is C 2 m/s

The average speed is defined as the ratio of total distance covered to the given time interval.
Here the total distance covered is equal to (60 m + 40 m + 60 m = 160 m) and the time is 80 sec.
Therefore the average speed $=\frac{\text{Total distance covered}}{\text{time}}=\frac{160m}{80s}=2m/s$