Question 980744
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Tractor 1: (1 field)/(5.6hrs)=0.179 field/hr
Tractor 2: (1 field)/(2.8hrs)=0.357 field/hr
Together: 0.179 field/hr+0.357 field/hr=0.536 field/hr
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To plow 1 field at 0.536 field/hr:
(1 field)/(0.536 field/hr)=1.87 hours