alleryA cuboidal room is 8 m long, 5 m wide and 4 m high. What is the area of its four walls?
A80 m2
B104 m2
C160 m2
D208 m2
Answer & Solution
Correct answer: B. 104 m2
1. Lateral surface area = 2h(l + b).
2. 2 × 4 × 13 = 104 m2.
3. 160 is twice the base plus a wall and 208 doubles the real answer.
_Source: NCERT Class 8 Mathematics, Chapter 9 Mensuration, 9.4.1 Cuboid_
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