Question

The total surface area of a cylinder whose
height is twice the radius is​

Answer 1

Answer: your answer in image

Step-by-step explanation:

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Answer 2

Answer:

let r be the radius and h be the height of a cylinder

given;h=2r

we know that total surface area of a cylinder =2*pi*r*h+2*pi*r^2

                                                                           =2*pi*r*(2r)+2*pi*r^2

                                                                           =4*pi*r^2+2*pi*r^2

                                                                =6*pi*r^2