A thin metal disc of radius `r` floats on water surface and bends the surface downwards along
Channel: Doubtnut
Date: 2020-01-26

A thin metal disc of radius `r` floats on water surface and bends the surface downwards along the perimeter making an angle `theta` with vertical edge of the disc. If the disc displaces a weight of water `W` and surface tension of water is `T`, then the weight of metal disc is :