1 Answer

Icycandy · Answer 1 · 2022-09-22T16:18:11+0000

Answer:

B.
$30\,s\,< t \le 40\,s$ .

Step-by-step explanation:

The vehicle is travelling eastwards when its velocity is positive and westwards when velocity is negative. According to the graph,
v > 0 for
$30\,s\,< t \le 40\,s$ . Hence, correct answer is B.

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