The total surface area of cube is 54cm2.what is the height of the cube

TSA of cube = 6l²= 54

6l²= 54

l²= 9

l=3= height of cube

Step-by-step explanation:

The height of cube is 3cm.

Step-by-step explanation:

let length be l.

In cube,

length = height = breadth

Total Surface Area(T.S.A) = 54cm^2

We know that,

T.S.A of cube = 6l^2

or, 54cm^2 = 6l^2

or, (54cm^2)/6 = l^2

or, 9cm^2 = l^2

or, (3cm)^2 = l^2

or, l = 3cm

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b