Răspuns :
Răspuns:
Pdreptunghi =2(L+l)
Sp=P/2=>1470=P/2=>P=1470·2=>P=2940 m → perimetru
l=2L/5
2940=2(2L/5+⁵⁾L)
2940:2=7L/5
1470·5=7L=>L=7350:7=>L=1050m → lungimea
l=2·1050:5=>l=420m → latimea
Răspuns:
Pdreptunghi =2(L+l)
Sp=P/2=>1470=P/2=>P=1470·2=>P=2940 m → perimetru
l=2L/5
2940=2(2L/5+⁵⁾L)
2940:2=7L/5
1470·5=7L=>L=7350:7=>L=1050m → lungimea
l=2·1050:5=>l=420m → latimea