Question

(A) An aquarium is in the form of a cuboid whose external measures are 80 cm x
30 cm x 40 cm. The base, side faces and back face are to be covered with a coloured paper . find the area of paper​

Answer 1

Answer:

11200 cm²

Step-by-step explanation:

Length of aquarium = 80 cm

Breadth of aquarium = 30 cm

Height of aquarium = 40 cm

All face of the aquarium need to be covered except for the top face.

Area of paper = Top Surface Area of aquarium - Area of top face

= 2(lb + bh + hl) - lb

= 2(80×30 + 30×40 + 40×80) - 80×30

= 2(2400 + 1200 + 3200) - 2400

= 2(6800) - 2400

= 13600 - 2400

= 11200 cm²