Current location - Plastic Surgery and Aesthetics Network - Plastic surgery and beauty - (2009? Jinan) In the comprehensive practical activity class, Xiaoming made a cone funnel model with cardboard. As shown in the figure, its bottom radius is OB=
(2009? Jinan) In the comprehensive practical activity class, Xiaoming made a cone funnel model with cardboard. As shown in the figure, its bottom radius is OB=
OB = 6,OC=8,

∴BC=OC2+OB2= 10cm,

The circumference of the cone bottom is 2π×6= 12πcm.

The lateral area of this funnel is s =12× BC×12 π = 60 π (cm2).

So choose C.