Question

daca un elev parcurge 120 metri in 40 secunde, cati metri va parcurge in 1/6 secunde?

Answer 1

Folosim regula de 3 simpla
120 m........... 40 s i. d
X m............. 1/6 s
120/x=1/6/40
12/x=1/6/4
3/x=1/6
X=3*6/1
X=18 metri va parcurge

Answer 2

$\\\boxed{ Regula de trei simpla: }\\ \\ 120 metri ................ 40 secunde \\ \\ x metri ....................... \dfrac{1}{6} secunde \\ \\ Avem proportionalitate directa (deoarece daca metrii cresc,\\ secundele cresc) \\ \\ \Rightarrow x = \dfrac{\dfrac{1}{6}\cdot 120}{40} \Rightarrow x = \dfrac{20}{40}\Rightarrow \boxed{ x = \dfrac{1}{2}}$

$\Rightarrow Elevul va parcurge \dfrac{1}{2} metri in \dfrac{1}{6} secunde.$