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:

880 690 750 960

880

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