i) l = 4 cm, b = 4 cm, h = 10 cm.
The total surface area of a cuboid = 2(lb + bh + lh)
= 2(4 × 4 + 4 × 10 + 4 × 10)
= 2(16 + 40 + 40)
= 2 × 96
= 192 Sq. cms.
ii) l = 6 cm, b = 4 cm, h = 2 cm.
The total surface area of a cuboid = 2(lb + bh + lh)
= 2(6 × 4 + 4 × 2 + 6 × 2)
= 2(24 + 8 + 12)
= 2 × 44 = 88 sq. cms.
