- 200 m
^{2} - 300 m2
- 100 m2
- None of the above.

Option 1 : 200 m^{2}

**Formula used:**

**Total surface of cube:**

A = 6a^{2}

**Diagonal of cube: **

d = a√3

Where a is the side of a cube.

**Calculation:**

Let the side of cube is 'a'

According to question, cube is constructed around the rod of length 10 m.

Hence, diagonal of cube

a√3 = 10

\(⇒ a\ = \ \frac{10}{\sqrt3}\)

Therefore, total surface area

\(A = 6(\frac{10}{\sqrt 3})^2\)

⇒ A = 200 m^{2}

Hence, total surface area of cube is 200 m2.

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