If the dimensions of a cuboid in cm are 16 $\times$ 14 $\times$ 20, then its total surface area is ______.

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If the dimensions of a cuboid in cm are 16 $\times$ 14 $\times$ 20, then its total surface area is 1648 cm2. Explanation: Total surface area of a cuboid = 2(lb + bh + hl). Here l = 16, b = 14, h = 20: l $\times$ b = 16 $\times$ 14 = 224 b $\times$ h = 14 $\times$ 20 = 280 h $\times$ l = 20 $\times$ 16 = 320 Sum = 224 + 280 + 320 = 824 Total surface area = 2 $\times$ 824 = 1648 cm2

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