Question

An aquarium is in the form of a cuboid
whose external measures are 80cm.
30cm. 40cm. The base and enternal faces
are to be covered with a coloured needed
paper. The needed paper will be: ​

Answer 1

Answer:

The paper needed will be 11200 cm².

Step-by-step explanation:

Given length = 80cm

Breadth = 30cm

Height = 40cm

Lateral surface area = 2(l+b)h

= 2(80+30)40

= 2×110×40 = 8800 cm²

Area of the base = length × breadth

= 80 cm × 30 cm

= 2400 cm²

Paper needed will be 8800 cm + 2400 cm

= 11200 cm²

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Answer 2

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Area of the paper required =7000 cm²

Step-by-step explanation:

Dimensions of an Aquarium:

Length (l) = 80 cm,

Breadth (b) = 30 cm,

Height (h) = 40 cm

/* According to the problem given,

Area of the paper required =

Area of the base + 2×Area of two side faces + Area of the back side

(Front side should be visible,So, it is not covered )

= lb+2×bh+lh

= 80×30+2×(30×40)+80×40

= 2400+2×1200+3200

= 2400+2400+3200

= 7000 cm²

Therefore,

Area of the paper required =7000 cm²

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