The area of a cardboard (in cm2) needed to make a closed box of size 20 cm × 10 cm × 8 cm will be:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 880
Given:
Length = 20 cm, breadth = 10 cm and height = 8 cm
Formula used :
Total surface area of cuboid = 2(lb + bh + hl) ---- (1)
Where, l = length, b = breadth and h = height
Calculations:
Using equation (1)
⇒ TSA = 2(20 × 10 + 10 × 8 + 8 × 20)
⇒ 2(200 + 80 + 160)
⇒ 2(440) = 880