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

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

 = 
 
 
 = 
 
 
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:
=

=

=

Thus 2 paperback books would fill the community pool