Question

Hema was making a model, in which she placed 4 cubes each of edge 20

cm one above the other. Find the surface area of the resulting cuboid.​

Answer 1

Hema was making a model, in which she placed 4 cubes each of edge 20  cm one above the other. Find the surface area of the resulting cuboid.​

Step-by-step explanation:

• The formula to find the surface of a cuboid is

T.S.A of cuboid=2 (lb + bh +hl)

• Given,

• side of cube=20cm

• In the cuboid formed,

• The length = 20+20+20+20

                          = 80cm

Also,  its height = breadth = 20cm

T.S.A of cuboid = 2 (lb + bh +hl)

             =2[(80*20) + (20*20) + (80*20)]

             =2(1600 + 400 + 1600)

             =2*3600

             =7200 cm²

Therefore, the surface area of the resulting cuboid = 7200 cm²