A hollow sphere has a small hole in it. On lowering the sphere in a tank of water, it is observed
Channel: Doubtnut
Date: 2020-07-26

A hollow sphere has a small hole in it. On lowering the sphere in a tank of water, it is observed that water enters into the hollow sphere at a depth of `40 cm` below the surface. Surface tension of water is `7 xx 10^(-2) N//m`. The diameter of the hole is