Answer:
FJH is an obtuse angle, so it is automatically larger than 90. Answer is D.
Volume = l*b*h
1. Ans 24 unit cubes
Because it had 6 unit cubes as length, 2 unit cunes as breadth and 2 unit cubes as height.
2. Volume = l*b*h
= 30*15*4
=1800 cubic feet