Question

What is the total surface area of a cube if side 20 cm?

Answer 1

Answer:

A=2400cm²

Step-by-step explanation:

i hope this helps you

Answer 2

$\underline{\underline{\sf{\maltese\:Given\::-}}}$

• Side of the cube is 20 cm

$\underline{\underline{\sf{\maltese\:To\:find\::-}}}$

• The total surface area of the cube.

$\underline{\underline{\sf{\maltese\:Solution\::-}}}$

Here we have given that the side of the cube so to find the total surface area of the cube we will apply the formula ( Total surface area of the cube = 6a² ).

$\qquad\sf{:\implies\:The\:Total\:surface\:Area\:of\:the\:cube\:=\:6\:(a)^{2}}$

$\qquad\sf{:\implies\:The\:Total\:surface\:Area\:of\:the\:cube\:=\:6\:(20)^{2}}$

$\qquad\sf{:\implies\:The\:Total\:surface\:Area\:of\:the\:cube\:=\:6\:\times\:400}$

$\qquad\sf{:\implies\:The\:Total\:surface\:Area\:of\:the\:cube\:=\:4200\:cm}$

Hence the total surface area of the cube is 4200 cm².