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# Three cubes of each side 4 cm are joined end to end. Find the surface area of the resulting cuboid. - Mathematics

Short Note

Three cubes of each side 4 cm are joined end to end. Find the surface area of the resulting cuboid.

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#### Solution

Side of each cube (a) = 4 cm

We need to find the surface area of the resulting cuboid

Dimensions of the resulting cuboid,

Length (l) = 3a

Breadth (b) = a

Height (h) = a

Surface area of the cuboid,

=2(lb + bh + hl)

=2[(3a) a +(a)(a) +a(3a)]

=2(7a^2)

=14a^2

= 14 xx 4^2

=224 cm^2

Surface area of the cuboid is 224  cm^2.

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#### APPEARS IN

RD Sharma Mathematics for Class 9
Chapter 18 Surface Areas and Volume of a Cuboid and Cube
Q 6 | Page 35
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