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9 February, 04:52

A cylindrical water tank is being filled with a hose. The depth of the water increases by 1 1/4 feet per hour. How many hours will it take for the water level in the tank to be 3 1/2 feet deep?

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  1. D
    9 February, 07:06
    0
    Assuming that the tank is empty

    1 and 1/4 times what=3 and 1/2

    convert to improper

    1 and 1/4=1+1/4=4/4+1/4=5/4

    3 and 1/2=3+1/2=6/2+1/2=7/2

    5/4 times what=7/2

    times both sides by 4/5 to clear fraction (5/4 timers 4/5=20/20=1)

    what=28/10

    what=20/10+8/10

    what=2+4/5

    answer is 2 and 4/5 hour or 2hr and 48mins
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