Height and Distance

The angle of elevation of the top P of a vertical tower PQ of height 10 from a point A on the horizontal ground is $45^{\circ}$. Let R be a point on AQ and from a point B, vertically above $\mathrm{R}$, the angle of elevation of $\mathrm{P}$ is $60^{\circ}$. If $\angle \mathrm{BAQ}=30^{\circ}, \mathrm{AB}=\mathrm{d}$ and the area of the trapezium $\mathrm{PQRB}$ is $\alpha$, then the ordered pair $(\mathrm{d}, \alpha)$ is :