a) A cuboid is 8m long, 12m broad and 3.5m high. Find its i) Total surface area ii) lateral surface area
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Step-by-step explanation:
Length of a cuboid = 8 m
Breadth of a cuboid = 12 m
Height of a cuboid = 3.5 m
(i) Total surface area = 2(lb + bh + hl)
= 2(8 x 12 + 12 x 3.5 + 3.5 x 8)
= 2(96 + 42 + 28)
= 2 x 166 = 332 m2
(ii) Lateral surface area = 2h(l + b)
= 2 x 3.5(8 + 12)
= 7 x 20
= 140 m2
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