Răspuns :
1ar=1dam²
⇒17200ar=17200dam²
⇒17200dam²=172ha;
⇒15km²=1500ha;
⇒1500ha+172ha
⇒1672ha;
⇒17200ar=17200dam²
⇒17200dam²=172ha;
⇒15km²=1500ha;
⇒1500ha+172ha
⇒1672ha;