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3.49 \times 10^{- 4} m s^{- 1}

9.34 \times 10^{- 4} m s^{- 1}

3.94 \times 10^{- 3} m s^{- 1}

8.34 \times 10^{- 4} m s^{- 1}

None

ANS : 1

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