Question 1023548
Is each tank  (or pond) fully open on top or closed on top?


radius is 1 meter.
{{{10(1.5*2pi*1+pi*1^2)}}}  if open on top or  {{{10(1.5*2pi*1+2*pi^1^2)}}} if closed top.


Those are {{{40pi}}}  or {{{50pi}}} square meters.