Question

three cubes each of side 3 cm are joined together side by side t form a cuboid . what is the surface area of the cuboid

Answer 1

Hii!!

here's ur answer...

if we join 3 cubes of edge=a cm, then their length will be=3+3+3=9 cm and it will form a cuboid.

TSA of the cuboid=2(lb+bh+lh)

=2{(9×3)+(3×3)+(9×3)}

=2(27+9+27)

=2×63

=126 cm²

hope this helps...

☺☺☺

Answer 2

Given,

Each side of the cube measures 3 cm.
Now,
3 cubes are kept side by side so they will surely form a cuboid whose length will be 3 + 3 + 3 cm or 9 cm.
The height of cuboid = Side of cube = 3 cm
The breadth of cuboid = The side of cube = 3 cm

Now we know,
Total surface area of cuboid, A = 2(lb + bh + hl)
A = 2(9 * 3 + 3 * 3 + 3 * 9)
A = 2(27 + 9 + 27)
A = 2 * 63
A = 126 cm^2

Hence,
The total surface area of the cuboid will be 126 cm^2