Poplar shadow

The nine-meter poplar casts a shadow 16.2 m long. How long does a shadow cast by Peter at the same time, if it is 1.4 m high?

Correct answer:

x =  2.52 m

Step-by-step explanation:

$$\begin{gathered} 9:16.2=1.4:x \\ x=1.4\cdot {\displaystyle \frac{16.2}{9}}={\displaystyle \frac{63}{25}}={\displaystyle \frac{63}{25}}\text{ m}=2.52\text{ m} \end{gathered}$$

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