Question

Un biciclist parcurge in 1 zi 3/10din drum a 2 zi 2/7 din rest i-au mai ramas 100km Ce lungime are drumul si ce distanta a parcurs in fiecare zi

Answer 1

notam x- distanta totala

prima zi : 3x/10
a 2a zi : 2/7* (x-3x/10) = 2/7 * (10x/10-3x/10)=2/7 *7x/10=x/5

3x/10 + x/5 + 100 =x
3x/10+2x/10 +100=x
5x/10+100=x
x/2+100=x
x-x/2=100
x/2=100
x=100*2=200 km
prima zi : 3*200:10=600:10=60km
a 2a zi : 200:5=40 km