Chad is planning a 672–mile road trip. • Chad’s car can travel 308 miles with 11 gallons of gas. • Chad plans to drive 168 miles every 3 hours. How many hours will it take Chad to drive 672 miles, and how many gallons of gasoline will he need?

Respuesta :

It will take Chad 12 hours to drive 672 miles and he will need 24 gallons of gasoline

How to calculate many hours will it take Chad to drive 672 miles?

Given that: Chad is planning a 672–mile road trip

Chad’s car can travel 308 miles with 11 gallons of gas. We can use this information to calculate the miles 1 gallon can cover. Thus:

Number of miles per gallon =   308/11 = 28 miles per gallon

Also, Chad plans to drive 168 miles every 3 hours. We can use this information to calculate Chad's speed. Thus:

Speed = 168/3 =  56 miles per hour

To determine how many hours it will take Chad to drive 672 miles:

Speed = distance/time

=> time = distance/speed    

Speed = 56 miles per hour and distance =  672 miles

time = 672/56 = 12 hours

Number of gallons = distance / Number of miles per gallon

Number of gallons = 672/28 = 24 gallons

Therefore, it will take Chad 12 hours to drive 672 miles and he will need 24 gallons of gasoline

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