What the other guy said. 10 = 2
So 10(2) 20(4) 30(6) 40(8) 50(10) 60(12) 70(14) and lastly. 80(16)
Simply divide 80 by 5. 5 goes into 80 16 times, and each 5 = one minuet, so it would take 16 minuets to fill the pool with 80 gallons.
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