SOLUTION: With 47 gallons of fuel in its tank, the airplane has a weight of 2186.7pounds. What is the weight of the plane with 77gallons of fuel in its tank?

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Question 935585: With 47 gallons of fuel in its tank, the airplane has a weight of 2186.7pounds. What is the weight of the plane with 77gallons of fuel in its tank?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
What is the density or specific gravity of the fuel? Call the density D in units of pounds_per_gallon; the increase from 47 to 77 gallons is %2877-47%29=30 gallons of fuel. The plane is now gross weight of %282186.7%2B30%2AD%29%2Apounds.