Question

find the lateral surface area and the total surface area of cuboid dimension 40 cm x 30 cm x 20 CM​

Answer 1

Step-by-step explanation:

LSA of cuboid

2(L+b)*h

$2(40 + 30) \times 20 \\ 2 \times 70 \times 20 \\ 2800 \\ tsa = \\ 2$

2(lb+bh+hl)

Answer 2

✪SOLUTION✪

★Given :

  Dimensions of cuboid are

  40cm × 30 cm × 20cm

★To find :

  The Lateral Surface Area and

  Total Surface Area (LSA & TSA)

✦Let,s solve

 Leteral Surface Area of cuboid

 is 2h ( l + b )

⇒ 2 × 20 ( 40 + 30 )

⇒ 40 × 70

= 2800 cm²

✦ Now we find Total Surface Area

   of cuboid

So,

T.S.A of cuboid = 2 (lb + bh + hl )

where length = 40cm, breadth =30 cm

and Height = 20cm

⇒ 2 (lb + bh + hl)

⇒ 2 (40 × 30) + (30 × 20) + (20 × 40)

⇒ 2 (1200) + (600) + (800)

⇒ 2 (2600)

= 5200 cm²