Question

A flagpost cast a 16.8m shadow. At the same time 2.4 m shadow is cast by a person who is 1.8 m tall, then the height of the flagpost is 12.6 m
If true then enter $1$ and if false then enter $0$

Answer 1

The triangle determined by the flagpost with its shadow and the person with its shadow form similar triangles.
$△ABC\sim △PQR$
$\frac{AB}{PQ}=\frac{BC}{QR}$
$\frac{1.8}{PQ}=\frac{2.4}{16.8}$
$PQ=\frac{1.8\times 16.8}{2.4}$
$PQ=12.6m$
Height of flag post = 12.6 m