$$\sqrt {0.0169 \times ?} = 1.3$$ Options: A . &nbsp10 B . &nbsp100 C . &nbsp1000 D . &nbspNone of these

$$\sqrt {0.0169 \times ?} = 1.3$$

Question

$$\sqrt {0.0169 \times ?} = 1.3$$

Options:

A . 10

B . 100

C . 1000

D . None of these

Answer: Option B
$$\eqalign{
& {\text{Let}}\sqrt {0.0169 \times x} = 1.3 \cr
& {\text{Then}},\,0.0169x = {\left( {1.3} \right)^2} = 1.69 \cr
& \Rightarrow x = \frac{{1.69}}{{0.0169}} = 100 \cr} $$

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