The metallic bob of simple pendulum has the relative density $5$. The time period of this pendulum is $10\,s$. If the metallic bob is immersed in water, then the new time period becomes $5 \sqrt{ x } s$. The value of $x$ will be.
  • A$4$
  • B$5$
  • C$3$
  • D$0$
JEE MAIN 2022, Medium
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