f/----/
t/----/----/----/----/
peste 16 ani
f /----/+16
t/----/----/----/----/+16
tatal are dublul varstei fiului adica /----/+16/----/+16
rezulta ca /----/----/----/ e egal cu /----/+16
adica 16 e suma a 2 segm egale
16:2=8 (1 segment)
fiul are 8 ani si tatal 4*8=32