Question

A boy starts from a point 'O' and travels 50 m in 30 s. He returns back to the same point 'O' in 20 s, then the average velocity of the boy is

• A. 0 m/s
• B. 1 m/s
• C. 4 m/s

Answer 1

The correct option is A 0 m/s

Since the boy starts from point 'O', and returns to the same point, the total displacement of the boy is 0 m.
We know, $\text{Average velocity}=\frac{\text{Total displacement}}{\text{Total time}}=\frac{0}{20}=0m{s}^{-1}$.
Therefore, average velocity of the boy is $0m{s}^{-1}$.