/sci/ - Science & Math

>>11199661
I don't understand what I am doing wrong here, I used the following method;
>split into two rectangles and calculate areas for each (900mm^2 & 720mm^2)
>find ybar for each (5mm & 45mm)
>use formula 5(900) + 45(720)/ 900 + 720 = 22.7.

Is there something I'm missing here? I can't seem to do a single question on centroids despite having gone through the PowerPoint and knowing the formulas, it should be so easy and yet I'm still going wrong.