A person with his hands in his pockets is skating on ice at the velocity of $10 \,m/s$ and describes a circle of radius $50\, m$. What is his inclination with vertical
  • A${\tan ^{ - 1}}\left( {\frac{1}{10}} \right)$
  • B${\tan ^{ - 1}}\left( {\frac{3}{5}} \right)$
  • C${\tan ^{ - 1}}(1)$
  • D${\tan ^{ - 1}}\left( {\frac{1}{5}} \right)$
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