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## Homework Statement

A cylindrical buoy floats in sea water with its axis vertical so that it's three-fourths submerged. The buoy is 0.8m in diameter and 2m in height. Its fabricated from iron plate 10mm thick. Calculate the mass of iron chain securing the buoy.

The relative density of iron is 7.8 and of sea water is 1.03

## Homework Equations

Not sure of this as I haven't been taught it at college, yet it is on my assignment, eek!

## The Attempt at a Solution

Really don't know where to start, I would be really grateful if somebody could help me through this. Thanks in advance!