Which of the following formulas will assist you in calculating the surface area of a cylinder? sa = 2lw + 2wh + 2lh sa = 2(pi)h + 2(pi)2 sa = 4(pi)2 sa = (pi)r + (pi)r2

The actual answer is:   SA = 2rh + 2r2

The answer is not SA = 2lw + 2wh + 2lh, the other guy has it incorrect. I put his answer in an assignment and I got it wrong. Trust me, the correct answer is SA = 2rh + 2r2.

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

step-by-step explanation: