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A particle moves under the law s=t^(3)-4...

A particle moves under the law `s=t^(3)-4t^(2)-5t.` If its acceleration is `4" units/sec"^(2)`, then its displacement is

A

9 units

B

`-9` units

C

18 units

D

`-18` units

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The correct Answer is:
D
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