Question

The total surface area of a one sided open cuboid whose height is ‘a’, breadth is double of

the height and length is double of the breadth, will be………………​

Answer 1

Answer:

4h² + 8bh

Step-by-step explanation:

According to question, the cuboid is one-sided open.

So, the total surface area will be:-

lb + 2(bh+hl) .........(i)

Given that breadth is double of the height:-

b= 2h

Also, it is given that length is double the breadth:-

l = 2b

putting the value of l and b in expression (i), we get:-

2b×2h + 2(2h×h + h×2b) = 4bh + 2(2h² + 2bh)

= 4bh +4h² + 4bh

= 4h² + 8bh