What is the volume of the trapezoidal right prism?		
 A.
846 m3
 B.
720 m3
 C.
423 m3
 D.
56 m3
                                             
                                          
                                          
                                        
											 
											(40+7) / 2 = 23.5
23.5 x 3 = 70.5
70.5 x 6 = 423 m3
Answer is C