Question

a water tank that is 45% filled to capacity contains 315 gallons. an inlet pipe is filling the water tank at a rate of 35 gallons per hour. how long does it take to fill the water tank to 75% capacity?
the tank holds 315/0.45 = 700 gallons
.75 * 700 = 525 gals
(525-315)/35 = 6 hours

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