Three cubes each of side `5c m` are joined end to end. Find the surface area of the resulting cuboid.

Explanation

If we join these three cubes, then the length of the resulting cuboid will be `5+5+5 = 15cm`.

Breadth and height will be `5cm`.

`:.` Surface area of the cuboid will be,

`S = 2(lb+bh+hl) = 2(15*5+5*5+5*15) = 2(175) = 350cm^2.`