If i'm mistaken; he needs to buy 3 sheets?
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
Step-by-step explanation:
Is it helpful ?
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Can you re order them I don’t understand your problems