Question

Un biciclist parcurge o distanta in 5 ore mergand cu 20 km/h. In cat timp parcurge acea distanta alt biciclist care merge cu 25km/h?

Answer 1

$viteza$ $b_{1}=20km/h$
$timp$ $b_{1}=5h$
$viteza$ $b_{2}=25km/h$
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distanta totala(d)= ?
timp b2 pe aceeasi distanta($t_{b2}$) = ?
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$d=v*t=20\frac{km}{h}*5h=100km$

$t_{b2}=\frac{d}{v}=\frac{100km}{25\frac{km}{h}}=4h$