Question

Two Cubes of edges 30 cm are joined to form a cuboid. Find the Surface Area Of Cuboid so formed.

Answer 1

two cube are joined so length of cuboid will be 60cm ,breadth will be 30 cm,height will be 30cm.
Area of a cuboid = 2(lb+bh+hl)
$= 2(60 \times 30 + 30 \times 30 + 30 \times 60) \\ = 2(1800 + 900 + 1800) \\ = 2 \times 4500 \\ = 9000 {cm}^{2}$
I hope it helps you.

Answer 2

hiii!!!

here's ur answer...

given the side ( edge ) of the cube is 30cm.

ATQ,

we have to join the cube with another same side of cube.

therefore length of the cuboid formed will be = 30 + 30 = 60cm

breadth and height will remain same.

now,

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

= 2 [ ( 60 × 30 ) + ( 30 × 30 ) + ( 60 × 30 ) ]

= 2 ( 1800 + 900 + 1800 )

= 2 × 4500

= 9000cm²

hope this helps u..!!