Question

An aquarium is in the form of a cuboid whose external measures are 70 cm *28 cm*
35 cm. The base, side faces and back face are to be covered with coloured paper Find the area of the paper needed.​

Answer 1

Answer:

area of aquarium = 2(lb+bh+hl)

,,,,,,,, =2 (70×28)+(28×35)+(70×35)

=2 (1960)+(980)+(2450)

= 2 (5390)

10780cm2

area that left =area of rectangular part on upper =70×28= 1960

paper needed = 10780-1960=8820cm2

.........

Step-by-step explanation:

area of aquarium = 2(lb+bh+hl)

,,,,,,,, =2 (70×28)+(28×35)+(70×35)

=2 (1960)+(980)+(2450)

= 2 (5390)

10780cm2

area that left =area of rectangular part on upper =70×28= 1960

paper needed = 10780-1960=8820cm2

.........

Answer 2

Given, a cuboid shaped aquarium

Length (l) = 70 cm

Breadth (b) = 28 cm

and height (h) = 35 cm

Now,

Area of base = 70 × 28 cm³

= 1960 cm³

Area of side face = (28 × 35) × 2 cm²

= 1960 cm²

Area of back face = 70 × 35 cm²

= 2450 cm

Thus, the total area = 1960 + 1960 + 2450 = 6370 cm²

Hence, area of paper required is 6370 cm².

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