Question

II. Four cubes each of side 3 cm are joined end to end. Find the surface area of the resulting cuboid.
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Answer 1

Answer:

Step-by-step explanation:

Each side of the cube ( a ) = 3cm

If 4 cubes are joined end to end

then the new solid so formed is

a cuboid ,

Dimensions bof the cubiod is ,

length ( l ) = 4a = 4 × 3 = 12 cm

Breadth ( b ) = a = 3 cm

Height ( h ) = a = 3 cm

Surface Area of the cuboid

= 2 ( lb + bh + lh )

= 2 [ 12 × 3 + 3 × 3 + 12 × 3 ]

= 2 [ 36 + 9 + 36 ]

= 2 × 81

= 162 square cm

Answer 2

Answer:

Each side of the cube ( a ) = 3cm

If 4 cubes are joined end to end

then the new solid so formed is

a cuboid ,

Dimensions bof the cubiod is ,

length ( l ) = 4a = 4 × 3 = 12 cm

Breadth ( b ) = a = 3 cm

Height ( h ) = a = 3 cm

Surface Area of the cuboid

= 2 ( lb + bh + lh )

= 2 [ 12 × 2 + 3 × 2 + 12 × 3 ]

= 2 [ 36 + 9 + 36 ]

= 2 × 81

= 162 square cm