If R is the radius of the base of the hate, then the total outer surface area of the hat is
Now total surface area of hate = curved surface area + top surface area + base surface area
= 2πrh + πr2 + π(R2-r2)
= 2πrh + πR2
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If R is the radius of the base of the hate, then the total outer surface area of the hat is
Now total surface area of hate = curved surface area + top surface area + base surface area
= 2πrh + πr2 + π(R2-r2)
= 2πrh + πR2