Question

A fish tank is in the form of a cuboid external measure of that cuboid are 80cm40cm30 cm the base side faces and back faces are to be covered with a colour paper find the area of the paper needed

Answer 1

2(lb+bh+hl)

2(80*40+40*30+30*80)

2(320+120+240)

2(680)

1360cm^3
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Answer 2

Answer:

L =80 cm,  B = 40 cm,  H = 30 cm

area of paper required = TSA of cuboid - area of (upper face + front face)

                                        =  2(lb + bh + hl) -(l × b + l × h)

                                        =   2(3200 + 1200 + 2400) - (3200 + 2400)

                                        =  2(6800) - 5600

                                        =  13600 - 5600

      area of paper required =  8000 cm²

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