Question

if R is the radius of the base of the hat,then the total outer surface area of hat would be​

Answer 1

Answer:

The area of the circle of the cylinder is πr².

The area of two circles will be 2πr².

The radius ‘r’ of a cylinder is the radius of its base. Now, the area of the rectangle = length × breadth. 2πr is the circumference of the circle and h is the height. Area of the curved surface will be = 2πr × h =  2πrh

So the area of the cylinder will be: 2πr² + 2πrh, or

Total Surface Area of Cylinder = 2πr ( r + h )

Where r is the radius and h is the height of the cylinder (the distance between the two bases).

Step-by-step explanation: