science
Grade-9
Easy
Question
A person runs around a square park of side 10 m, 4 times. What is the distance and displacement covered by the person ?
- 160 m, 0
- 0, 160 m
- 80 m, 0
- 0, 80 m
Hint:
160 m, 0 m
The correct answer is: 160 m, 0
Side of the square park = 10 m
Therefore, the perimeter = 4 x 10 = 40 m
The person runs around the park 4 times. Therefore, the distance that he covers = 40 x 4 = 160 m
After running around the park 4 times, the person comes back to the same point from where he begun. Thus, his displacement = 0.
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