2 questions about volume Urgent Urgent Urgent Urgent Urgent

1. The wood is a cylinder

If it is sawn into two sections laterally, two bottom surfaces are added, that is, the bottom area = 7.6/2 = 3.8 square decimeters, so the length of each section Volume = 3.8* (2.4/2) = 4.56 cubic decimeters

If two sections are added after sawing into two sections longitudinally, the cut area = 3.8 square decimeters and the bottom diameter = 3.8/2.4= 1.58 decimeters, so the volume of each segment = (0.79*0.79*3.14*2.4)/2=2.35 cubic decimeters

2. From the question, we know that the height of this cuboid is 8 meters and the length of the base is 8 /4=2 meters

Surface area of ??cuboid = bottom area*2+side area*4=2*2*2+2*8*4=72 square meters