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

Explanation

Three cubes each of side 5cm
are joined end to end

then it wil become a cuboid of length `l= 15cm`
and `b=5cm`

`h=5cm`

so total surface area of cuboid `=2(lb+bh+hl)`

`=2(15xx5+5xx5+5xx15)`

`=350cm^2`