10.3 × 10.3 × 10.3 + 1/10.3 × 10.3 - 10.3 + 1 is equal to :

Answer: Option C

Given expression :
$$\begin{array}{rl}& =\frac{{\left(10.3\right)}^3+1^3}{{\left(10.3\right)}^2-\left(10.3\times 1\right)+1^2}\\ & =\left(\frac{a^3+b^3}{a^2-ab+b^2}\right)\\ & =(a+b)\\ & =\left(10.3+1\right)\\ & =11.3\end{array}$$