Question

The total surface area of a cuboid of length 'l', breadth 'b' and height 'h' in square units is

• A. lbh
• B. 2h(l + b)
• C. 2(1b + bh + lh)
• D. 2(l + b)

Answer 1

The Correct Option is C

Correct answer: 2(lb + bh + lh)

Explanation: 
The total surface area (TSA) of a cuboid is the sum of the areas of all six rectangular faces. 
A cuboid has:

• 2 faces of size \( l \times b \)
• 2 faces of size \( b \times h \)
• 2 faces of size \( l \times h \)

So, the total surface area is: \[ 2(lb + bh + lh) \]

Hence, the total surface area is 2(lb + bh + lh).