Equilibrium of Chemistry!

It's Always better to generalise to check concepts

Let's take a Compound $A$ in a container . Let's take $10 \quad Molar$ $A$ in $1 \quad L$ solution.

We know that the following reaction occurs in the container -

$A \xrightleftharpoons[]{} B + C$ $\qquad {K}_{eq1} = 0.250$

$B \xrightleftharpoons[]{} 2D$ $\quad \qquad {K}_{eq2} = 4$

You are also given Molecular weight of $A$ as

${Mol}_{A} = 10 \quad grams$

What is the Final Vapour Density of the solution ?

Your Answer can be represented as $V.D = \frac {M}{N}$ where M & N are coprime positive integers.

Enter your Answer as $M \times N$

This is a part of my well-known set Aniket's Chemistry Challenges .