The solid figure is made up of 4 identical cubes of edge 19 cm.
- Find the volume of the solid figure.
- Find the total surface area of the solid figure.
(a)
Volume of each cube
= 19 x 19 x 19
= 6859 cm
3 Volume of the solid figure
= 4 x 6859
= 27436 cm
3 (b)
Total surface area is the total area of the exterior surface of a solid.
Total number of faces
= 5 + 5 + 3 + 5
= 18
Area of each side of the cube
= 19 x 19
= 361 cm
3 Total surface area of the solid figure
= Area of 18 faces
= 18 x 361
= 6498 cm
2 Answer(s): (a) 27436 cm
3; (b) 6498 cm
2