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# Three blocks that are in the shape of a cube with each side 3.2 cm are attached end to end. Calculate the T.S.A of the resulting cuboid?

- 143.36
- 134.66
- 133.36
- 144.36

Hint:

### TSA of cuboid = 2[lb + bh + hl]

Where , l is length, b is breadth , h is height

## The correct answer is: 143.36

### We are given the side of the cube as 3.2 cm.

When three cubes of side 3.2 cm are joined, the resulting shape is a cuboid of

length l = 3.2×3=9.6 cm;

breadth b = 3.2 cm

and height h= 3.2 cm

So, total surface area of a cuboid = 2(lb + bh + lh)

=2(9.6×3.2+3.2×3.2+9.6×3.2)

=143.36 cm^{2}

Therefore the total surface area of the cuboid obtained is 143.36 cm^{2}

Therefore the correct option is a)143.36

^{2}

Therefore the total surface area of the cuboid obtained is 143.36 cm

^{2}

Therefore the correct option is a)143.36

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