Răspuns :
in prima zi a arat a/4, a doua zi 2a/8=a/4
a-(a/4+a/4)=a-2a/4=a-a/2=a/2 , deci 1/2 din teren a ramas nearat
a-(a/4+a/4)=a-2a/4=a-a/2=a/2 , deci 1/2 din teren a ramas nearat