If the volume of a triangular prism is 140 cubed the base length is 5 and base height is 8 what is the height

The height would be 7cm because the area of the base (the triangle face) is 20cm². You would then divide the volume by the area of the base to get the height. 140/20=7cm
Hope this helped!

The height would be 70 in squared. First find the area of the triangle. 5*8/2= 20. 

We know the volume is 140=20x. If we isolate the x by dividing by both sides, you can get 70 as the height.