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Answer 1

Answer:

Step-by-step explanation

length =80cm

Breadth=40cm

Height=20cm

TSA of cuboid = 2 (lb+bh+hl)

=2 (80×40+40×20+20×80)

=2 (3200+800+1600)

=2 (5600)

= 11,200

Therefore area of Box = 11,200cm^2

Side = 40cm

Therefore

No of sheets required = area of cuboid÷side of square sheet

=11200÷40

=280

Therefore no of sheets required is 280