How many gallons are in an in-ground pool that is 40 by 20 with the shallow end being 3ft deep and the deep end being 9ft deep?

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An in-ground pool that is 40 feet by 20 feet with the shallow end being 3ft deep and the deep end being 9ft deep has a volume of approximately 35,900 US gallons. (The depth of variable depth pools is generally calculated by adding the shallow and deep ends and dividing by two).
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If the depth of a 40ft by 20ft rectangular pool varies from 9ft at the deep end to 4ft at the shallow end how many gallons of water will fill it?

Answer . If we assume that the bottom of the pool is a flat surface, then its average depth is 6.5 feet. Its capacity is therefore:. 6.5 x 4 x 9 = 5200 cubic feet.. The n

How many gallons to fill a 25 x 50 ft pool with a deep end of 9 ft and shallow 3 feet deep?

Not knowing the point where the pool begins the transition from 3 feet to 9 feet makes it a little hard to answer.. If it slopes directly from 3 to 9 feet the answer would be
In Swimming Pools

How many gallons in a pool 20 foot by 40 foot 3 foot shallow end and 8 foot deep end?

As long as the slope of the bottom is constant and continuous, with no flats or sudden drop-offs, we can treat the whole pool as if its depth is the average of 3-ft and 8-