alleryA box measures 20 cm by 15 cm by 10 cm. Find the total area of all its faces.
A650 cm2
B2600 cm2
C3000 cm2
D1300 cm2
Answer & Solution
Correct answer: D. 1300 cm2
1. TSA = 2(lb + bh + hl).
2. 2(300 + 200 + 150) = 2 × 650 = 1300 cm2.
3. 650 forgets the factor 2 and 3000 is the volume.
_Source: NCERT Class 8 Mathematics, Chapter 9 Mensuration, 9.4.1 Cuboid_
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