You can put this solution on YOUR website! Note: I'm assuming that the given lengths of "A=10cm and B=6cm" are the lengths of the semi-major and semi-minors axes.
The area of an ellipse is simply where 'A' is the area, 'a' is the length of the semi-major axis, and 'b' is the length of the semi-minor axis.
So in this case, just plug in , and 3.142 for to get