Răspunsuri

2014-06-16T20:07:03+03:00
P=2l+2L=560

7dam=70m

L-70=l

2*(L-70)+2L=560
2L-140+2L=560
4L=560+140
4L=700
L=175

l=175-70
l=105
2014-06-16T20:11:38+03:00
7 dam = 70 m
L = l + 70
P = 2 L + 2 l    inlocuim pe L cu l + 70
560 = 2 (l + 70) + 2 l
560 = 2 l + 140 + 2 l
560 - 140 = 4 l
420 = 4 l
l = 420 : 4
l = 105 m  are latimea
105 * 2 = 210 m au cele 2 latimi
560 - 210 = 350 m au cele 2 lungimi
350 : 2 = 175 m are lungime
3 2 3