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A 2000L tank containing 550L of water is being filled with water at the rate of
75L per minute from a full 1600L tank.
How long will it be before the two tanks have the same amount of water?
Let t = time required for the two levels to be equal
2k tank amt = 1600 tank amt
75t + 550 = 1600 - 75t
75t + 75t = 1600 - 550
150t = 1050
t = 7 hrs
Check solution by finding the amt in each
75(7) + 550 = 1600 - 75(7)
525 + 550 = 1600 - 525
1075 = 1075