Mathematics
A cuboid is 8 m long, 12 m broad and 3.5 m high. Find its
(i) total surface area
(ii) lateral surface area
Surface Area, Volume, Capacity
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Answer
(i) Given:
Length of cuboid = 8 m
Breadth of cuboid = 12 m
Height of cuboid = 3.5 m
The total surface area of the cuboid = 2(l x b + b x h + h x l)
= 2 (8 x 12 + 12 x 3.5 + 3.5 x 8) m2
= 2 (96 + 42 + 28) m2
= 2 x 166 m2
= 332 m2
Hence, the total surface area of the cuboid is 332 m2.
(ii) Lateral surface area of cuboid = 2(l + b)h
= 2(8 + 12)3.5 m2
= 2 x 20 x 3.5 m2
= 140 m2
Hence, the lateral surface area of the cuboid is 140 m2.
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