Question

Question 44

Total surface area of a cylinder of radius h and height r is ___

Answer 1

$2\pi h(r+h)$
Given, radius of cylinder = h and height of cylinder = r
$\therefore$ Total surface area of a cylinder = Curved surface area + Area of top surface + Area of base
$=2\times \pi \times Radius\times Height+\pi (Radius{)}^2+\pi (Radius{)}^2=2\pi hr+\pi h^2+\pi h^2=2\pi rh+2\pi h^2=2\pi h(r+h)$