SOLUTION: How long will it take a 6 foot wide planter to cover completely 42 acres at 6mph?

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Question 437384: How long will it take a 6 foot wide planter to cover completely 42 acres at 6mph?
Answer by lwsshak3(11628) About Me  (Show Source):
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How long will it take a 6 foot wide planter to cover completely 42 acres at 6mph?
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At 6 mph, tractor covers:
6ft*5280ft/hr=31680 sq ft/hr
1-mile = 5280 ft
1 acre=43560 sq ft
42*43560 sq ft/31680 sq ft/hr=57.75 hrs
ans:
It will take a 6 foot wide planter 57.75 hours to cover completely 42 acres at 6mph