At a certain moment Harleen, who is 1.8 m tall, casts a shadow 2.4 m long. At the same moment a water tower casts a shadow 36 m long. How tall is the tower?

Explanation

1. 01

   Harleen and her shadow, and the tower and its shadow, form similar right triangles (the sun's rays make the same angle).

2. 02

   Height ÷ shadow is the same: $\frac{h}{36} = \frac{1.8}{2.4} = \frac{3}{4}$.

3. 03

   $h = 36 \times \frac{3}{4} = 27$ m.