Mrs. Flowers has two combines to harvest 525 acres of corn. One combine has a 12-row header and the other has an 8-row header. The combine with the 12-row header harvests 10.4 acres per hour using 1.2 gallons of diesel fuel per acre. At the same time, the combine with the 8-row header harvests 7.8 acres per hour using 1.3 gallons of diesel fuel per acre.
a. Using both combines, how many acres do they harvest per hour?
b. How many hours does it take them to harvest the corn?
c. How many acres does each combine harvest?
d. How many gallons of diesel fuel are used?
a. 18.2 a/hr
b. 28.8 hr
c. 225 a
d. 652.5 gal
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