Question

Aflati lugimea si latimea unei case care are P de 560 m si latimea este de 3 ori mai mica decat lungimea

Answer 1

l+L=560m:2=280m
l   |.........|
L  |.........|........|..........|
l=280m:4=70m
L=70mx3=210m

Answer 2

P = 560  l = L : 3  ⇒L= 3l
P = 2L + 2l
560 = 2 x 3l + 2l
560 = 6l +2l
560 = 8l
l = 560 : 8
l = 70 m
L = 3L = 3 x 70 = 210
L = 210 m

Verificare: P = 2L + 2l = 2 x 210 + 2 x 70 = 420 + 140 = 560 m