A thin metal disc of radius `r` floats on water surface and bends the surface downwards along the
Channel: Doubtnut
Date: 19/01/2020

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 of the disc. If the disc dispplaces a weight of water `W` and surface tension of water is `T`, then the weight of metal disc is