Shots are fired from the top of a tower and from its bottom simultaneously at angles $30^o$ and $60^o$ as shown. If horizontal distance of the point of collision is at a distance $'a'$ from the tower then height of tower $h$ is :
Shots are fired from the top of a tower and from its bottom simultaneously at angles $30^o$ and $60^o$ as shown. If horizontal distance of the point of collision is at a distance $'a'$ from the tower then height of tower $h$ is :
- A
$\frac{2a}{\sqrt 3}$
- B
$\frac{a}{\sqrt 3}$
- C
$2a$
- D
$\frac{4a}{\sqrt 3}$
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