There is a row of two triangular pyramid in one pentagon oh pyramid in a display at a museum. How many lateral faces are there altogether? One

There is only one lateral face in a triangular pyramid. So, if there are two triangular pyramids in the display, the total number of lateral faces would be 2.

Wrong

I apologize for the incorrect response. Let me correct my answer.

In a triangular pyramid, there are three triangular lateral faces. If there are two triangular pyramids in the display, then the total number of lateral faces would be 3 + 3 = 6.