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Sagot :
Answer is 20 and 240
Unitary Method :
The formula of the unitary method is to find the value of a single unit and then multiply the value of a single unit to the number of units to get the necessary value.
Here, for 1 gallons 20 miles are travelled and for 2 gallons 40 miles. so on.
So, here the multiplication factor is 20.
i.e., the miles travelled are 20 times the gallons used.
Now, 1 gallon, 20 miles are travelled, then for 12 gallons, the miles travelled are 20 miles * 12 = 240 miles.
Learn more about Unitary method here:
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