The excess pressure due to surface tensi...

The excess pressure due to surface tension inside a shperical drop is `6 N//m^2`. If 27 such drops coalesce, the excess pressure inside the new drop is

A

`6N//m^2`

B

`18 N//m^2`

C

`12 N//m^2`

D

`2 N//m^2`

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