Question

. A triangular prism is attached to a rectangular prism as shown below.

Answer 1

I got u 
5*5*2 for both sides of squares =50
8*8/2*2 for both sides of right triangles =64
8*20*2 for roof portion= 320
20*5*3 for walls and floor of house shape =300
z-x*y for space under roof and above walls 
6.3*20=126
50+64+320+300+126=860 your answer is A 
plz give brainliest -J (: