Question

ma ajutati va rog la aceste probleme

Answer 1

P = 960
l=L-62 => P=2L+2l = 2L + 2(L-62) = 2L + 2L - 124 = 4L - 124 = 960 => 4L=1084 => L=271 si l=271-62=209

P patrat = P dreptunghi 
L=180 => l=180/3=60
P=180*2+60*2 = 360 + 120 = 480 - P dreptunghi
P patrat = 480 => L patrat = 120

L=15 km = 15 000 m 
l=15/8 * 1 000 m 
P = 30 000 + 15/4 * 1 000 = 33 750 m

1 dam = 10 m
L=420 m
l=160 dm = 1600 m
P = 2*420 + 2* 1600 = 3200 + 840 = 4040