Question

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

Options

• 4480 cm²

• 1648 cm²

• 824 cm²

• 1740 cm²

Answer 1

If the dimensions of a cuboid in cm are 16 × 14 × 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 × b = 16 × 14

= 224

b × h = 14 × 20

= 280

h × l = 20 × 16

= 320

Sum = 224 + 280 + 320

= 824

Total surface area = 2 × 824

= 1648 cm²