Calculate the LSA of a cuboid of ,length = 40cm ,breadth = 20cm and height = 10cm.

The correct answer is: 1200

• We are given the dimensions of cuboid.

length = 40cm = l
breadth = 20cm = b
height = 10cm = h

• We will calculate the LSA of given cuboid

We know that,
The Lateral Surface area of cuboid = 2h( l + b)

• By using the above formula of the lateral surface area of the cuboid, we get

The lateral surface area of the given cuboid is,

= 2h( l + b)

= 2  10  (40 + 20)

= 20  (60)

LSA= 1200 cm²
Therefore the Lateral surface area of the given cuboid is 1200 cm².
The correct answer is option d) 1200.