[填空题]
The diagram below shows the fd8 zceje7eu7 chahx 89 +t,m*cross section of a cylindrical tf7i0za0azdwt7 wb9a j :u sv7 du5x)/pipe, 80 cm in length, carrying water. The pipe has au 0 ax) w9s57t0v7dua/jt7 fwizbdaz : 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.
