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You are in the pit crew for a driver at a Nascar race. The gas weighs 5.92 pounds per gallon. Your driver uses 0.25 gallon per lap. With 42 laps to go, you put 60 pounds of fuel in the tank of the car. Will your driver finish the race at the rate without more gas?

Respuesta :

60 pounds of fuel at 5.92 pounds per gallon is 60/5.92=10.13 gallons of gas.

42 laps at .25 gallons per lap is 42*.25=10.5 gallons of gas.  As this is slightly more than 10.13, the driver will not finish the race, and needs a bit more gas in the tank.

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