Question

A vertical pole of length $12m$ casts a shadow $4m$ long on the ground and at the same time a tower casts a shadow $21m$ long. Find the height of the tower.

Answer 1

Length of the vertical pole $=12m$

Shadow of this pole $4m$

Let the height of the tower be $h$.

And Shadow of this tower $=21m$

Therefore,

$\frac{12}{4}=\frac{h}{21}$

$3=\frac{h}{21}$

$h=63m$

Hence, this is the answer.