Answer: the answer would be that there is 20 cups in a gallon to find measurements like that ok so 4×4=16 so there is 4 cups in a quarter so it says 1 and a quarter of a gallon or 1 and 1/4 so 16 × 0.25=4 then now you can see that the calculation is correct so then 5×4=20 so 20cups is your answer
hope i helped
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