Question

the total surface area of a cone is 30 Pi if its base radius is 3 then find the curved surface area ​

Answer 1

Answer:

radius=14, slant height =50

Curved surface area of cone=π(14)(50)=2200cm

2

Total surface area of coneπr(r+l)=π(14)(14+50)=2816cm

2

radius=35,height =8.4 dm=84 cm,slant height=

r

2

+h

2

=91cm

Curved surface area of cone=π(35)(91)=10010cm

2

Total surface area of cone =πr(r+l)cm

2

=π(35)(35+91)=13860cm

2