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When 6 gallons of gasoline are put into a car's tank the indicator goes from 1/4 of a tank to 5/8. What is the total capacity of the gas tank?

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2 answers

  1. let the number of gallons in the tank be x

    (5/8)x - (1/4)x = 6
    (3/8)x=6
    x = 16

    check:
    1/4 full would be 4 gall
    5/8 full would be 10 gallons
    must have put in 6 gallons, all is good!

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  2. I'm Kingsley. I'm a Nigerian and can't teach students from 8years old to 13years old.... Call me on
    +234-8134448536

    Initially the tank had 1/4 of gasoline. Then 6 gallons is added and the tank now has 5/8
    Write the expression like this
    1/4 + 6 litres = 5/8
    Then subtract 1/4 from both sides to isolate 6 litres
    1/4-1/4 + 6litres= 5/8-1/4
    6 litres = 5/8-1/4
    6litres = 3/8
    So 3/8 of full tank is 6 litres
    What is the full tank?
    Let the full tank be X litres
    3/8 of X = 6 litres
    So X = 6litres × 8/3
    X = 16 litres

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