Question

Two cubes each of side 8 centimetre is it a joint and end to end find the surface area of resulting cuboid

Answer 1

hi
here is your answer !

Solution:
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Given: For each cube , side = 8 cm.
For the resulting cuboid,

$l \: = (8 + 8) = 16\: cm$
$b \: = \: 8 \: cm$
$h = 8 \: cm$

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

$= 2(16 \times 8 + 8 \times 8 + 16 \times 8))$

$= (128 + 64 + 128)$

$= 2(320)$

$= 640 \: {cm}^{2}$

Therefore,
The surface area of the resulting cuboid is 640 sq .cm.

$hope \: this \: helps$

Answer 2

Hy there,

The cubes are joined end to end to form cuboid, then
The lenght of the cuboid= 2×each
side of both cubes
=2×8
=16cm
The breadth of the cuboid=each side
of the cube
=8cm
The height of the cuboid=each side
of cube
=8cm
Now,
l=16cm
b=8cm
h=8cm
Surface area of cuboid= 2(lb+bh+hl)
= 2[(16×8)+(8×8)+(8×16)]
= 2[128+64+128]
= 2×320cmsq.
= 640cmsq.
Thus, the surface area of cuboid is 640cmsq.

Hope this will help you...
:)