The area of a cardboard (in cm2) needed to make a closed box of size 20 cm x 10 cm x 8 cm will be:
Answer & explanation
Correct answer: option 1
We know that,
TSA = 2 × (lb + bh + lh)
l = Length
b = Breadth
h = Height
We have,
Length = 20 cm
Breadth = 10 cm
Height = 8 cm
According to the question,
TSA = 2 × (20 × 10 + 10 × 8 + 20 × 8) = 880 cm2