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