[填空题]
The diagram below shai1qg5va; mo 6s,ym.mo4pc dka-pft3 p77 3ufows the cross section of a cylindrical pipe, 80 cm in length, carrying wad7o-uf 4c 7p33kf tppater. The pipe has a radius of 15 cm.
The pipe is not at full capacity, such that the chord length of the water level [AB] is20 cm. Find the volume of water in the pipe.
