2 Answers

Zhengyang Liu · Answer 1 · 2022-09-12T10:02:56+0000

Answer:

$\displaystyle A_{ \text{surface}} = 42cm ^(2)$

Explanation:

we are given the base area of a cube

recall the surface area formula of a cube

$\displaystyle A_{ \text{surface}} = 6( {a}^(2) )$

notice that, we are given the base area 7cm² in other words we are given a² i.e 7cm²

Thus substitute:

$\displaystyle A_{ \text{surface}} = 6( 7 )cm ^(2)$

simplify multiplication:

$\displaystyle A_{ \text{surface}} = 42cm ^(2)$

and we are done!

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