Question 943610
composite figure with a cylinder with a height of 8 cm and a radius of 9 cm plus a cone with a height of 6 cm and radius of 9 cm.  What is the Volume?  I got 2543.4 cm cubed.  
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Cylinder: {{{Vol = pi*r^2*h = pi*9^2*8 = 648pi}}} cc
Cone:  {{{Vol = pi*r^2*h/3 = pi*9^2*6/3 = 162pi}}} cc
Total = 810pi cc
=~ 2544.69 cc
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You probably rounded more than once.