Question

Ajutor repede:
1)12g3kg=......hg
2)Daca 14 m de stofă costa 144,2 lei atunci 5 m de stofă costa?
3)Daca o mașină are viteza de 80 km/h, atunci în 15 minute parcurge......km

Answer 1

[tex]1. \\ 12g+3kg=12g+3000g=3012g=301,2hg \\ 2. \\ 14m ...............................144,2lei \\ 5m ................................xlei \\ =\ \textgreater \ x= \frac{144,2*5}{14} =51,5lei \\ 3. \\ 1h ........................ 60minute \\ x ........................15minute \\ =\ \textgreater \ x= \frac{1*15}{60}= \frac{1}{4} =0.25 \\ D=V*T=\ \textgreater \ D=80km/h*0.25=20km [/tex]

Answer 2

2) 14m stofa.............144,2lei
5m stofa..................x
x=5×144,2/14=721/14=51,5lei



3) 60min.............80km
15min.................x
x=15×80/60=60/3=20km