What is the surface area of a cube if its height (a side) is 3cm?

Use the formula SA = 6 (side squared)

A. 45

B. 54

C. 25

D. 36

Option B

Step-by-step explanation:

The side is 3cm.

The surface area is 54cm^2. Therefore, Option B should be the correct answer.

Brainilet Appreciated.

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18