Q. 13.8( 13 Votes )

# A cuboid is 12 cm

Answer :

Length = l = 12 cm

Breadth = b = 9 cm

Height = h = 5 cm

Total surface area of cuboid = 2 × (lb + bh + lh)

= 2 × (12×9 + 9×5 + 12×5)

= 2 × (108 + 45 + 60)

= 2 × 213

= 426 cm^{2}

Therefore, total surface area of the cuboid is 426 cm^{2}

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