A thin metal disc of radius 'r' floats on water surface 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

A thin metal disc of radius 'r' floats on water surface bends the surf

1.	A thin metal disc of radius 'r' floats on water surface 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
Answer» `2 pi R T + W` `2 pi r T cos theta - W` `2 pi r T cos theta + W` `W - 2PI r T cos theta` ANSWER :C