Answer:
Question 1: Add the volumes
100 + 80 = 180 meters^3
Questions 2: Subtract the volumes
100 - 80 = 20 meters^3
Explanation:
The formula for volume is:
V = lwh
The volume for figure A:
V = 5 x 5 x 4
V = 100 meters^3
The volume for figure B:
V = 4 x 4 x 5
V = 80 meters^3
Question 1: Add the volumes
100 + 80 = 180 meters^3
Questions 2: Subtract the volumes
100 - 80 = 20 meters^3