4: 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 the paper needed? (hint the final answer is 8000cm²)
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Answers & Comments
Area of paper required
=
area of base
+
2 area of side
+
area of back
=
(
80
×
30
)
+
2
(
30
×
40
)
+
(
80
×
40
)
=
2400
+
2400
+
3200
=
8000
c
m
2