Question

calculate the total surface area of each fish tank, each in the shape of an cuboid

Answer 1

Answer:

The tank is in the shape of a cuboid.

To find the area of the paper required, we need to calculate the surface area of the cuboidal tank and subtract the area of the top side and the front side.

Total surface area of a cuboid of length l, breadth b and height h =2(l×b+b×h+l×h)

length =80 cm,breadth =40 cm and height =30 cm =2(80×40+40×30+30×80)=2(3200+1200+2400)=13600cm

2

Area of the top side =80×40=3200cm

2

Area of the front side =80×30=2400cm

2

Hence. area of the paper required =13600−3200−2400=8000cm

2

Answer 2

Total surface area of a cuboid of length l, breadth b and height h =2(l×b+b×h+l×h)

length =80 cm,

breadth =40 cm

height =30 cm

=2(80×40+40×30+30×80)

=2(3200+1200+2400)

=13600cm2

Area of the top side =80×40=3200cm2

Area of the front side =80×30=2400cm2

Hence. area of the paper required =13600−3200−2400=8000cm2