A5. Farmer Kosec has a square-shaped lawn, 120 m long. He mowed the grass on it with a tractor mower, which had a 1.5 m long blade. At least how many times did he have to drive the tractor mower across the lawn to mow it to half?
(A) 80 times
(B) 70 times
(C) $60-\text{times}$
(D) 50 times
(E) 40 times
A5. Farmer Kosec mows a $120 \mathrm{~m}$ long lawn at least $120: 1.5=80$ times to mow it completely. He mows the lawn at least 40 times to mow half of it.