# Weight of fluid block

1. Feb 25, 2016

### werson tan

1. The problem statement, all variables and given/known data
why the formula of weight of fluid block is given by the formula of ρg[ (R^2) - pi(R^2) ] 1?

what does the 1m mean here ?
shouldn't it = ρg (pi) (R^2) h ?
2. Relevant equations

3. The attempt at a solution

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2. Feb 25, 2016

### BvU

It's a square minus a quarter circle. $W$ is the weight of 1 m length (i.e. into the paper) of the area shaded grey in the right picture in Fig 3-36.