Read the information given carefully and answer the question that follows:

(A) 72 kmph = 20 m/s

(B) 25 m/s = 80 kmph

(C) Total Surface area of a Cube of edge length $a$ is $6a^2$

(D) Volume of a Cube of edge length $a$ is $a^3$

Choose the correct answer from the options given below:

Checking statement (A): 72 kmph = 20 m/s

To convert km/h to m/s, multiply by $\frac{5}{18}$ (since 1 km = 1000 m and 1 hour = 3600 seconds, giving $\frac{1000}{3600} = \frac{5}{18}$)

$72 \times \frac{5}{18}$

$= \frac{72 \times 5}{18}$

$= \frac{360}{18}$

$= 20$ m/s

Statement (A) is correct.

---

Checking statement (B): 25 m/s = 80 kmph

To convert m/s to km/h, multiply by $\frac{18}{5}$

$25 \times \frac{18}{5}$

$= \frac{25 \times 18}{5}$

$= \frac{450}{5}$

$= 90$ kmph

The statement claims 80 kmph, so statement (B) is incorrect.

---

Checking statement (C): Total Surface Area of Cube = $6a^2$

A cube has 6 faces (top, bottom, front, back, left, right).

Each face is a square with area $= a^2$

Total surface area $= 6 \times a^2 = 6a^2$

Statement (C) is correct.

---

Checking statement (D): Volume of Cube = $a^3$

Volume $=$ length $\times$ width $\times$ height

For a cube, all sides are equal $= a$

Volume $= a \times a \times a = a^3$

Statement (D) is correct.

---

(A) is correct

(B) is incorrect

(C) is correct

(D) is correct

Therefore, statements (A), (C) and (D) are correct.

---

This is what NTA has done:

Even though option 2 and 4 are the same, they awarded marks only to option 2. If we've missed something, let us know!