science
Grade-9
Easy
Question
The s-t graph of a car’s journey is shown in the figure below. The car stops for some time at a mall. How long did the car stop?
- 40 s
- 70 s
- 30 s
- 20 s
Hint:
30 s
The correct answer is: 30 s
The car stopped at the mall for the 30s
Justification:
From distance A to B the car is not changing its position. The car travels 6m and then stopped for the mall and after the 30s the car starts its journey and travels 8m more and then comes back to its initial point.
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