D. The solid figure can be broken into rectangles, it’s dimensions would be 24mx0.4m E. To find how much concrete is needed you have to... multiply LxWxH So multiply 1.8x1.2x2.4=5.184 Then divide 1.8 by 3= 0.6 Each small rectangle is 0.6 m in height 5.184-1.8=3.384
