$$\begin{aligned} \sqrt{\frac{32.4}{x}} = 2 \end{aligned}$$

Answer: Option B

Explanation:

$$\begin{aligned} = \frac{2707}{27.07} = \sqrt{x} \end{aligned}$$

$$\begin{aligned} => \frac{2707 \times 100}{2707} = \sqrt{x} \end{aligned}$$

$$\begin{aligned} => 100 = \sqrt{x} \end{aligned}$$

$$\begin{aligned} => x = 100^2 = 10000 \end{aligned}$$

Answer: Option B

Explanation:

$$\begin{aligned} => \sqrt{81} + \sqrt{0.81} = 10.09 - X \end{aligned}$$

$$\begin{aligned} => 9 + 0.9 = 10.09 - X \end{aligned}$$

$$\begin{aligned} => X = 10.09 - 9.9 = 0.19 \end{aligned}$$

Answer: Option B

Answer: Option A

Explanation:

$$\begin{aligned} 3600 = 2^3 \times 5^2 \times 3^2 \times 2 \end{aligned}$$
To make it a perfect cube it must be divided by
$$\begin{aligned} 5^2 \times 3^2 \times 2 = 450 \end{aligned}$$

Answer: Option C

Explanation:

$$\begin{aligned} = \sqrt{\frac{25}{16}} \end{aligned}$$

$$\begin{aligned} = \frac{\sqrt{25}}{\sqrt{16}} \end{aligned}$$

$$\begin{aligned} = \frac{5}{4} \end{aligned}$$

$$\begin{aligned} = 1\frac{1}{4} \end{aligned}$$