The velocity of sound in a gas at pressure $P$ and density $d$ is
  • A$v = \sqrt {\frac{{\gamma P}}{d}}$
  • B$v = \sqrt {\frac{P}{{\gamma d}}}$
  • C$v = \gamma \sqrt {\frac{P}{d}}$
  • D$v = \sqrt {\frac{{2P}}{d}}$
AIIMS 2009, Easy
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