Two springs, of force constants $k_1$ and $k_2$ are connected to a mass $m$ as shown. The frequency of oscillation of the mass is $f$ If both $k_1$ and $k_2$ are made four times their original values, the frequency of oscillation becomes
  • A$2f$
  • B$f /2$
  • C$f /4$
  • D$4f$
AIEEE 2007, Medium
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