Question

O tija infipta vertical lasa o umbra de 6 m care este inaltimea tijei daca o alta tija cu inaltimea 2.5m are umbra de 3 m .?

Answer 1

$u_{1}$=6
$h_{1}$=?
$u_{2}$=3
$h_{2}$=2,5

$u_{2}$ * 2 =$u_{1}$
$h_{2} *2= h_{1}$
⇒ 2,5 *2 = 5
$h_{1}=5$