It takes 15 minutes to fill 125 gallons with petrol from a tanker. How long will it take to fill 72 gallons

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• 15/125 = t/72

so, t = (72 x 15)/125 => 8.64 minutes

i.e. 8 minutes and 38 seconds

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• You do not appear to be advance!

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• It takes 15 minutes to fill 125 gallons with petrol from a tanker. How long will it take to fill 72 gallons

time=15 (72/125) = 8.64 minutes

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• We can set up a ratio:

(time) / (gallons) = (time) / (gallons)

x / 72 = 15 / 125

x = (15/125) * 72

x = 3/25 * 72

x = 216/25

x = 864/100

x = 8.64 minutes

Okay, but maybe you want that in something a human would understand with some seconds? Let's take those 0.64 minutes and convert them to seconds.

0.64 (minutes) * 60 (seconds/minute)

= 38.4 seconds

8 minutes 38.4 seconds

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• The time needed=72(15/125)=8.64 min.

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• It will take 72/125 times 15 = 8.64 minutes

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• If it takes 15 minutes to fill 125 gallons with petrol from a tanker,

it will take minutes 8.64 minutes to fill 72 gallons.

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• 125/15 = 8.333 (gallons per minute)

72/8.333 = 8.6 minutes

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• 125 gallons takes 15 minutes

1 gallon takes 15/125 minutes

72 gallons takes 15x72/125 = 8.64 minutes.

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