Question

un biciclist parcurge un drum in doua zile. in prima zi 40% din drum , iar in a doua zi restul de 72 km . ce distanta a parcurs in prima zi?

Answer 1

x=lungime drum
40%x+72=x
0,4x+72=x
0,6x=72
x=72/0,6
x=120 km
120 x 40%=48 km ziua 1

Answer 2

40[la suta]+72km=100[la suta];
⇒60/100 ·x=72
⇒x=72·100/60
⇒x=7200/60
⇒x=120[km-distanta totala-parcursa de biciclist];
⇒40/100 ·120=4800/100=48[km-distanta parcursa in prima zi];