Calculating Area of Curve in 2m Deep Water

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Homework Statement



here's a picture of the problem

http://i39.tinypic.com/28u017m.jpg

I am trying to workout the area of the section of the curve submerged in 2 m deep water.


This is not a homework. I am studying for my exam.. so i am just doing a bunch of different problems.

Homework Equations





The Attempt at a Solution



I know I have to calculate the angle of the curve submerged first in order to workout the area.
 
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I think you're making this more complicated than it really is. You can figure out the angle of the arc portion submerged in the water, then use basic geometry (i.e. sector area = angle (in rads) * .5 * radius^2), to get the area.
 

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