12. Find the distance travelled by the boy

A boy of height 0.7 $m$ is walking towards a $71 \ m$ Qutub minor tower. The angle of elevation from his eyes to the top of the tower increases from 30$^{\circ}$ to 60$^{\circ}$ as he walks towards the tower. Find the distance he walked towards the tower.

 

Answer:

 

The distance the boy walked towards the tower is $i\sqrt{i}$ $m$.

 

(Note: If it is a whole number, write as it is. If not, round off to $3$(max) decimal places.)