Maths-
General
Easy

Question

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

  1. 300
  2. 600
  3. 400
  4. 1200

Hint:

 Lateral Surface Area (LSA) of cuboid = 2h( l + b)
where
l → length of the cuboid
b → breadth of the cuboid
h → height of the cuboid

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 cross times 10 cross times (40 + 20)

    = 20 cross times (60)

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

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