Question

three cubes of side 3 centimetre each are kept adjacent to each other find the surface area of the resulting cuboid so formed​

Answer 1

The lenght,breadth and height of the cube be 3 cm.

If three cubes are joined together then the lenght will be 3 cm+3cm +3cm=9cm

breadth will be 3cm.

and also hight will be 3cm.

Then the total surface area of the cuboid

=2(lb+bh+hl)

=2(9×3+3×3+3×3)

=2(27+9+9)

=2×45

=90

hence,the total surface area of cuboid is 90 cm^2.

hey mate,

hope this helps you...

Answer 2

Step-by-step explanation:

So first H=B=L= 3cm

when all the cubes are joined,

L=9cm

B=3cm

L=3cm

TSA of cube= 2( lb+bh+hl)

= 2(9×3+3×3+3×9)

= 2(27+9+27)

= 2(63)

= 126 cm²