Time period of a simple pendulum is $T$. The time taken to complete $5 / 8$ oscillations starting from mean position is $\frac{\alpha}{\beta} T$. The value of $\alpha$ is ..... .
  • A$5$
  • B$3$
  • C$7$
  • D$6$
JEE MAIN 2021, Diffcult
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