Răspuns :
4)7 costume..............21m
250 costume............x
250*21/7=250*3=750 m
5)a=250 km
b=250*2=500 km
b=c+350 atunci c=500-350=150
a+b+c=250+500+150=900 km
250 costume............x
250*21/7=250*3=750 m
5)a=250 km
b=250*2=500 km
b=c+350 atunci c=500-350=150
a+b+c=250+500+150=900 km