Question

Two cubes each of 8 cm edge are joined end to end find the surface area of area resulting cuboid

Answer 1

Heya frnd,

Length = 16 cm
Height = 8 cm
Breadth = 8 cm

Surface area of cuboid = 2(lb+bh+hl)
=2(16*8+8*8+8*16)
=640cm^2

Answer 2

Answer:

Given :-

Two cubes each of 8 cm edge are joined end to end.

To Find :-

What is the total surface area of the resulting cuboid.

Formula Used :-

${\red{\boxed{\small{\bold{T.S.A\: of\: cuboid =\: 2(LB + BH + HL)}}}}}$

where,

T.S.A = Total Surface Area

L = Length

B = Breadth

H = Height

Solution :-

Two cubes each of 8 cm edge are joined,

Then,

↛ 2(8 cm)

↛ 2 × 8 cm

➦ 16 cm

Hence, new length is 16 cm.

Given :

Length = 16 cm

Breadth = 8 cm

Height = 8 cm

According to the question by using the formula we get,

⇒

$\sf T.S.A =\: 2(16 × 8 + 8 × 8 + 8 × 16)$

⇒

$\sf T.S.A =\: 2(128 + 64 + 128)$

⇒

$\sf T.S.A =\: 2(192 + 128)$

⇒

$\sf T.S.A =\: 2(320)$

⇒

$\sf T.S.A =\: 2 \times 320$

➠

$sf\bold{\purple{T.S.A =\: 640\: {cm}^{2}}}$

${\underline{\boxed{\small{\bf{\therefore The\: total\: surface\: area\: of\: the\: resulting\: cuboid\: is\: 640\: {cm}^{2}.}}}}}$