It neve mentions how much of his farm he uses, but assuming he uses all of it
area=base times height
given
base=4.2
height=3
area=4.2 times 3
area=12.6 square kilometers
answer is 12.6 km²
10.20
BECAUSE IF YOU ROUND THE TENTHS 4 MEANS 0.
There are 300 seconds in 5 minutes
