A thin wire ring of 3 cm radius float on the surface of liquid. The pull required to raise the ring before the film breaks is `30.14xx10^(3)N` more than its weight. The surface tension of the liquid (in `Nm^(-1))` is

Options

A. `80 xx 10^(-3)`
B. `87 xx 10^(-3)`
C. `90 xx 10^(-3)`
D. `98 xx 10^(-3)`

Answer

A

Explanation

`T=(F)/(4pir)`