Question

Three cubes each side 5 cm are joined end to end.Find the surface area of resulting cuboid.

Answer 1

Length of each side of the cube = 5 cm

Now, 3 cubes are joined end-to-end.

∴length of cuboid, l = (5 + 5 + 5) cm = 15 cm

breadth of cuboid, b = 5 cm

height of cuboid, h = 5 cm

∴Surface area of the cuboid = 2(lb + bh + hl)

= 2( 15 × 5 + 5 × 5 + 5 × 15 ) cm2

=350cm2

Answer 2

☺☺ HERE IS YOUR ANSWER ☺☺
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Three cube of side 5cm joined and form cuboid.

length of cuboid = 15cm
height of cuboid = 5cm
breadth of cuboid = 5cm

T.S.A of cuboid = 2(lb+bh+jl)

=2(15×5 + 5×5 + 5×15)

=2(75 + 25 + 75)

=2(175)

=350cm^2

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☺ HOPE IT HELPS YOU ☺

THANKS...