Question

What is the total surface area of the cuboid shown below?

• A. 200 unit square
• B. 160 unit square
• C. 100 unit square
• D. 60 unit square

Answer 1

The correct option is B 160 unit square

We know that the total surface area of a cuboid = $2\times (l\times b+l\times h+b\times h)$, where,
l = length of a cuboid = 10 units
b = breadth of the cuboid = 2 units
h = height of the cuboid = 7 units
On substituting the values of l, b, h in equation given above, we get:
Total surface area of cuboid $=2\times (10\times 2+10\times 5+2\times 5)=2\times (20+50+10)=2\times \left(80\right)=160unitsquare$