Question

Three identical cubes od side 4 cm are joined end to end. Find the total su

Answer 1

full question :- three identical cubes of side 4cm are joined end to end. find the total surface area.

ATQ, 3 identical cubes of side 4cm are joined end to end.

hence, now it's a cuboid since cube has all it's edges equal.

length of the cuboid = 4 + 4 + 4 = 12cm

breadth of the cuboid = 4cm

height of the cuboid = 4cm

formula to find the total surface area of a cuboid is 2(lb + bh + lh)

= 2 [ (12 × 4) + (4 × 4) + (12 × 4) ]

= 2 ( 48 + 16 + 48 )

= 2 × 112

= 224cm²

hence, the total surface area of the cuboid is 224cm².

Answer 2

Answer:

⇒ 224 cm²

Step-by-step explanation:

Here,

Three identical cubes having side 4cm are joined end to end. Therefore, it's a cuboid.

Now,

Breadth of the Cuboid = 4 cm

Length of the Cuboid = 12 cm

Height of the Cuboid = 4 cm

We know that,

Total surface area of cuboid:

⇒ 2 ( lb + bh + lh )

So,

⇒ 2 ( 12 × 4 + 4 × 4 + 12 × 4 )

⇒ 2 ( 48 + 16 + 48 )

⇒ 2 × 112

⇒ 224 cm²