What is the volume of the figure composed of two congruent triangular prisms if a = 5 units, b = 3 units, and c = 6 units?
 A. 90 cubic units
 B. 60 cubic units
 C. 45 cubic units
 D. 180 cubic units
Pleaseee help and explain!!!!!
                                             
                                          
                                          
                                        
											 
			                   
					                  