Question 28
If R is the radius of the base of the hat, then the total outer surface area of the hat is a) πr(2h+R) b) 2πr(h+R) c) 2πrh+πR2 d) None of these
State True or False . The total surface area of a cylinder of radius 'r' and height 'h' is 2πr(h+r) .