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3. (25pts) You have a beam with the cross section shown. Take x=0 (horizontal) and y=0 (vertical) at the lower left corner at

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30 mm 400mm 50mm O * Somm somm To Calculate 9) Area oly Crossection J A= Alt Az A = 400x30 A2 = 300x5o A = 27000 mm 2 - AnsweYem = A₂Y₂ AY+ AI+ A2 = (300x 50X25) + (400x30) x eso 300 XS0 + 400x30 Tom = 125 mm - Answer. ononnon 30mm. Centroid. T 4oomm- Iyy = Iy + Iy2 Iy, = x 300 x 50 = 11:25*10 mmt Iy2 = x 30°x400 = .ogx10 mmt Iyy - (11-257.09 )xv0? = 11.34 X10 mmt - Answer

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3. (25pts) You have a beam with the cross section shown. Take x=0 (horizontal) and y=0...
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