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18 October, 00:16

A town's water tower holds 1 million gallons of water. During the day,

the tower is only 2

}5

of its full capacity. The tower will be refilled at night, when water

consumption is low, using a pump that pumps water into the tower at a rate of

2000 gallons of water per minute. How long will it take to bring the tower back to

full capacity? Explain how you got your answer. If the town had a pump that only

filled the tank at 500 gallons per minute, how much longer would it take to fill

the tank?

Algebra 1

2-28 Chapter Resource

+5
Answers (1)
  1. 18 October, 03:17
    0
    Time it will take to bring water to full capacity = 300 minutes

    Longer it will take if pump is 500 gallons per minute rate = 900 minutes longer

    Step-by-step explanation:

    Total Capacity = 1,000,000 gallons (1 mill)

    It is full 2/5th, so it is empty:

    1 - 2/5th = 3/5th

    Now,

    3/5th of 1,000,000 = 600,000

    So, we need to fill up 600,000 gallons

    The pump rate is 2000 gallons per minute, so the time it will take:

    600,000/2000 = 300 minutes

    If the pump was 500 gallons per minute rate, that would take:

    600,000/500 = 1200 minutes

    So, it will take:

    1200 - 300 = 900 minutes longer
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