Question

Find the surface areas of the cuboids whose dimensions are:

I = 21 cm, b = 14 cm, h = 9 cm PLEASEEE help im weak in maths​

Answer 1

Answer:

Area of cuboid =

$2(lb + bh + hl)$

$= 2(21 \times 14 + 14 \times 9 + 9 \times 21)$

$= 2(294 +126 + 189)$

$= 2(609)$

$= 1218$cm square