Question

find the area of the cardboard required to make an open box of length 28cm,breadth 2cm and height 3.6 cm.​

Answer 1

Answer:

Area of cardboard required = 2(28×2 + 2×3.6 + 28×3.6)

= 2(56 + 7.2 + 100.8)

= 2 × 164

= 328

Explanation:

Total Surface Area of cuboid = 2(lb + bh + hl)

Answer 2

Answer:

Total surface area = 2( lb+bh +lh)

= 2(28×2+2×3.6+28×3.6)

2(56+7.2+100.8)

2× 164

328cm²