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GALLON AS A FRACTION OF FULL TANK

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GALLON AS A FRACTION OF FULL TANK

by enriqueta26 » Fri Jul 16, 2010 1:17 pm
COULD SOMEBODY PLEASE GIVE ME A HAND ON THIS ONE?

A CAR TRAVELS 50 M/H AND USES 1 GALLON OF GAS EVERY 30 MILES. IF THE CAR STARTS WITH A FULL 12 GALLON TANK AND TRAVELS FOR 5 HOURS AT 5O MILES/HOUR, THE AMOUNT OF GAS USED WOULD BE WHAT FRACTION OF A FULL TANK?
ANSWER: 25/36

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by ayushiiitm » Fri Jul 16, 2010 1:44 pm
total fuel = 12 gallons

With 1 gallon he can travel 30 miles

so with 12 he can travel 360 miles

Now he travels 5*50 miles=250

so used/total=250/360 =25/36
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by enriqueta26 » Fri Jul 16, 2010 2:21 pm
thank you so much, awesome!!!!
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by Patrick_GMATFix » Fri Jul 16, 2010 3:28 pm
If you can enriqueta, please don't type in ALL CAPS when you post the question. Please.
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by enriqueta26 » Fri Jul 16, 2010 4:32 pm
ok. Thank you for your help and advice Patrick!!!!
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by Patrick_GMATFix » Fri Jul 16, 2010 4:54 pm
*thumbs up
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by shashank.ism » Sat Jul 17, 2010 3:10 am
Total distance covered = 50*5= 250 Miles.
so, Total gallons used = 250/30 = 25/3
fraction = (25/3)/12 = 25/36
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