Question

six solid cubical stools with edge 65cm are to be painted red on all the sides. Find the quantity of paint required to paint the six cubical stools, if one can of paint is required to paint is required to paint 11,700cm^2

Answer 1

$\large\underline\bold{Given:}$

Number of cubes to be painted = 6
Side of each of these cubes = 65 cm
Cans required to paint 11700 cm^2 = 1

$\large\underline\bold{To~Find:}$

Quantity of paint required to paint the six cubical tools

$\large\underline\bold{Solution:}$

Total Surface Area of each cube ( TSA ) = 6a^2
TSA = 6 * ( 65 ) ^ 2

On solving we get,

TSA for 1 cubical tool = 25,350 cm^2

Now as we need 1 can for painting 11,700 cm^2,

For painting 1 cubical tool = 25,350 / 11,700
For painting 1 cubical tool = 2.2 cans

So,

For 6 cubical tools = 2.2 * 6
For 6 cubical tools = 13.2 cans

So,
For 6 cubical tools = 14 cans