Question

Find the lateral surface area and total surface area of a right circular cylinder (cylinder) of radius= 4.2cm and height= 20cm.

Answer 1

Find the lateral surface area and total surface area of a right circular cylinder (cylinder) of radius= 4.2cm and height= 20cm.

Answer 2

why do you post the question twice?
So annoying
the two circular bases have area 2πr^2
the lateral surface area is just a rectangle, with width equal to the circumference of the circle, so its area is 2πrh

to be simpler,
A = 2πr(r+h)

So now just plug in your numbers.