During heavy rain, a section of a mountainside measuring 2.7 km horizontally (perpendicular to the slope), 0.42 km up along the
1 answer:
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Answer:
The answer is "between 20 s and 30 s".
Explanation:
Calculating the value of positive displacement:
Calculating the value of negative displacement upon the time t:
That's why its value lie in "between 20 s and 30 s".