Mathematics
NULL
Medium
Question
The perimeter of the floor of a room is 18 m. What is the area of the four walls if the height is 3 m?
A
21 sq m
B
42 sq m
C
54 sq m
✓ Official correct answer
D
108 sq m
Community credibility
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
A
21 sq m
No member explanations yet for this option.
B
42 sq m
No member explanations yet for this option.
C
54 sq m
No member explanations yet for this option.
D
108 sq m
No member explanations yet for this option.
Explanation
Lateral wall area = perimeter × height = 18 × 3 = 54 m².