#### Answer

$38.65\,s$

#### Work Step by Step

$\text{time}=\frac{\text{distance}}{\text{speed}}=\frac{400\,m}{10.35\,m/s}=38.65\,s$

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$38.65\,s$

$\text{time}=\frac{\text{distance}}{\text{speed}}=\frac{400\,m}{10.35\,m/s}=38.65\,s$

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