Clearly, the decorative cloth forms a cylinder of base diameter 20 cm and height `= (30 + 2.5 + 2.5) cm = 35 cm`
Thus, r = 10 cm and h = 35 cm
Area of the decorative cloth
= lateral surface area of a cylinder having r = 10 cm and h = 35 cm
`= (2pi rh) cm^(2)`
`= (2 xx (22)/(7) xx 10 xx 35) cm^(2) = 2200 cm^(2)`