Question 1102168
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Airplane + 50 gallons of fuel weights 2175 pounds.   (1)

Airplane + 18 gallons of fuel weights 1999 pounds.   (2)
----------------------------------------------------------Subtract (2) from (1). You will get

           32 gallons of fuel weight 2175 - 1999 = 180 pounds.  ====>

====>       1 gallon of fuel weights {{{180/32}}} = 5.625 pounds.


(Airplane + 60 gallons of fuel)'s weight = (Airplane + 50 gallons of fuel weight) + weight of 10 gallons of fuel = 

                                            2175 + 10*5.625 =  2231.25 pounds.


<U>Answer</U>.  Airplane with 60 gallons of fuel weights 2231.25 pounds.
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