Answer:
Dimensions of paperback book :
Length = 12 feet
Breadth = 15 feet
Height = 15 feet
Volume of Paperback book =

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Dimensions of swimming pool:
Length = 40 feet
Breadth = 30 feet
Height = 5 feet
Volume of swimming pool =

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Now we are supposed to find how many paperback books would fill the community pool he visits.
So, No. of paperback books would fill the community pool:
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Thus 2 paperback books would fill the community pool