Question

Mergand cu viteza constanta un autoturism parcuge in 2,8(3) ore o distanta de 170 km .
Ce distanta va parcurje in 7,(3) ore ???

Answer 1

2,8[3]⇒283-28/90⇒255/90⇒85/30⇒17/6;
⇒17/3h⇒170km;
7,[3]⇒73-7/9⇒66/9⇒22/3;
⇒22/3h⇒x[km];
⇒x=[22/3 ·170]/17/3
⇒x=[[22·170]/3]/17/3
⇒x=[3740/3]/17/3
⇒x=3740/3/17/3
⇒x=3740/3·3/17
⇒x=3740/17
⇒x=220[km-va parcurge]'