Răspuns:
Explicație pas cu pas:
10
L1/L2=8/5 l1/l2=4/3
A1/A2=L1×l1/L2×l1=8/5×4/3=32/15
11
A1/A2=81/121=l1²/l2²=(l1/l2)² ⇒l1/l1=9/11
P1/p2=4l1/4l2=l1/l2=9/11
