Question

You might need: Calculator

At an ice carving competition, each carver starts with a block of ice with the dimensions shown. The block is
wrapped in a special reflective material to keep it from melting before the competition starts.
1.1 m
0.8 m
1.3 m
How much reflective material is needed to cover the block completely, without any overlaps?
Give an exact answer (do not round).
m?

Answer 1

So, what you are supposed to find here is the surface area of this rectangular prism. So the answer is 52 units of the special reflective material is needed.

Since total surface area of a rectangular prism = 2(lb + bh + hl)

Where l = length of the ice block

b = width of the ice block

h = height of the ice block

Now total surface area for the given dimensions = 2(4×2 + 2×3 + 3×4)

= 2(8 + 6 + 12)

Answer 2

It's 6.7

Explanation:

Got 52 on Khan Academy for you. It's 6.7