Question

If a cuboidal box has height, length and width as 20 cm, 5 cm and 10 cm respectively. Then its total surface area is: 
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Answer 1

Step-by-step explanation:

height = 20cm

length = 5cm

width = 10cm

total surface area = 2(lb+bh+hl)

$= 2(5 \times 10 + 10 \times 20 + 5 \times 20) \\ = 2(50 + 200 + 100) \\ = 2 \times 350 \\ = 700 {cm}^{2}$