A toy is in the form of a cone of radius 3.5 cm mounted on a hemisphere of same radius. The total height of the toy is 15.5 cm. Find the total surface area of the toy
As per the question:
The radius of the conical part = 3.5 cm
And,
Radius of the hemispherical part = 3.5 cm
Height of hemispherical part = Radius (r)
= 3.5
= 
cm
Height of conical part (h) = 15.5 - 3.5
= 12 cm
Slant height of the conical part(l) = 
= 
= 
= 
= 
Total surface area of toy = CSA of conical part + CSA of hemispherical part
= πrl + 2πr2
= 
* 
* 
+ 2 * 
* 
* 
= 137.5 + 77
= 214.5 cm2
11