notăm:
I=prima zi
II=a doua zi
III=a treia zi
IV=a patra zi
T=lungimea traseului
I=T/2
II=(T-T/2)/2=T/4
III=[(T-T/2)/2]/2=(T/4)/2=T/8
IV=25
I+II+III+IV=T
T/2+T/4+T/8+25=T
4T/8+2T/8+T/8-8T/8= -25
-T/8= -25
T/8=25
T=8*25
T=200
I=100
II=50
III=25
IV=25
Sper că ai înțeles!
;)