Bob just filled his car's gas tank with 20 galions of gasohol , a mixture consisting of 5% ethanol and 95% gasoline. If his car runs best on a mixture consisting of 10% ethanol and 90% gasoline, how many gallons of ethanol must he add into the gas tank for his car to achieve optimum performance?

Question

Bob just filled his car's gas tank with 20 galions of gasohol , a mixture consisting of 5% ethanol and 95% gasoline. If his car runs best on a mixture consisting of 10%  ethanol and 90%  gasoline, how many gallons of ethanol must he add into the gas tank for his car to achieve optimum performance?

Accepted Answer

সঠিক উত্তর: 9/10। ব্যাখ্যা: