Răspuns:
l (latimea) =3/7 L (L= lungimea)
⇒L = 7/3 l
a) L / l=?
L / 3l / 7= L · 7/3L = 7/3
L / l = 7 / 3
b) l/P =?
l / P = 3 l / 7 totul supra 2(3/7 L + L) = 3L/7 totul supra (6L/7 + 2 L)
=3L/7 · 7/20 L = 3/20
l/P = 3/20
c) L/P =?
L/P = 7l / 3 totul supra 2 (l + 7/3 l) = 7l / 3 · 3/20 l = 7 / 20
