6 in. -6 in.- Prob. 9-59 in. 6 in. x 9-6 *9-60. Locate the centroid y for the beam's cross-sectional bea area. wel 120 mm 240 mm 240 mm 240 mm 120 mm Prob. 9-60 9-61. Determine the location y of the centroid C of the beam having the cross-sectional area shown. 150 mm 15 mm B 9.