Question

wooden article was made by scooping out time is there from from each end of a solid cylinder with the height of the cylinder is 10 cm and its base radius is
3.5 centimetre find the total surface area of the article

Answer 1

The Answer is.....

Given that, 
Radius (r) of cylindrical part = Radius (r) of hemispherical part = 3.5 cm 
Height of cylindrical part (h) = 10 cm 
Surface area of article = CSA of cylindrical part + 2 x CSA of hemispherical part 
= 2 π r h + 2 x 2 π r2 
= 2 π x 3.5 x 10 + 2 x 2 π x 3.5 x 3.5 
= 70 π + 49π 
= 119 π 
= 17 x 22 = 374 cm2 

Hope This Helps....