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A cistern, internally measuring 150\ ...

A cistern, internally measuring `150\ c mxx120\ c mxx110\ c m` has `129600\ c m^3` of water in it. Porous bricks are placed in the water until the cistern is full to the brim. Each brick absorbs one seventeenth of its own volume of water. How many bricks can be put in without the water overflowing, each brick being `22. 5\ c mxx7. 5\ c mxx6. 5\ c m` ?

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