Two equal drops are falling through air with a steady velocity of $5 \,cm / second$. If two drops coalesce, then new terminal velocity will be ......... $cm / s$

  • A

    $5 \times(4)^{13}$

  • B

    $5 \sqrt{2}$

  • C

    $\frac{5}{\sqrt{2}}$

  • D

    $5 \times 2$

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