Math Question: A car uses 3 1/8 gallons of gasoline per hour when driving on the highway. How many gallons will it use after 4 2/3 hours

You get 3 1/8 gals per hour on the highway. This trip is 4 2/3 hours (presumably all driving on the highway). 3 1/8 = 25/8 gals per hour 4 2/3 hours = 14/3 hours We want to know gals per trip gals per trip = (gals per hour) * (hours per trip) 25/8*14/3= 350/24=14.5833333333... That's a little ugly, but it has to be a rational number, since it's 350/24, which is a rational number. We know 24 goes into 350 more than 14 but less than 15 times. So our number is 14 r/24. We can do long division here, or just: 14*24=336 350-336=14 -- this is r, the remainer so we have: 14 14/24 gals= 14 7/12 gals
Answered On 05/27/2020 16:01