Question

The top of a building from a fixed point is observed at an angle of elevation ${60}^o$ and the distance from the foot of the building to the point is $100m$. The height of the building is $100\sqrt{a}m$, then
$a$ is _____ .

Answer 1

$Lettheheightofthebuildingbehm.In△ABC,\tan {60}^{\circ }=\frac{AB}{BC}\sqrt{3}=\frac{h}{100}h=100\sqrt{3}m$