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 resulting cube​

Answer 1

The formula to find the surface of a cuboid is

T.S.A of cuboid =2 (Ib+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=7200cm²

I hope it's helps you chotti