Question

two cubes each of volume 64 cm cube are joined end to end find the surface area of the resulting cuboid.​

Answer 1

explanation:

SOLUTION

Volume of the cube = a³

Therefore,

a³ = 64

⇒ a³= (4)³

⇒ a = 4

Each side of the cube = 4 cm

Then,

length of the cuboid ⇒ (2 × 4)

Breadth of the cuboid = 4 cm

Height of the cuboid = 4 cm

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

=2[(8 × 4)+(4 × 4)+(8 × 4)]cm²

=(2 × 80) cm²

= 160 cm²

Answer 2

Answer:

we have to find their l , b , h

if it is cube it means all edges are same

so let the the edge x

x^3=64

x=3_/64

x=4cm

now we will connect them with breadth

now 2×(lb+bh+hl)

2×(4×8+8×4+4×4)

2×(32+32+16)

2x(80)

160cm