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

A. 10

B. 100

C. 1000

D. None of these

Answer: Option B

Solution(By Examveda Team)

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