Question

If slant height of the cone is 21cm and the diameter of fhe base is24cm the total surface area of a cone is

Answer 1

Step-by-step explanation:

Given:-

slant height of the cone is 21cm and the diameter of fhe base is24cm.

To find:-

Find the total surface area of a cone.

Solution:-

Slant height of the cone (l)=21 cm

Diameter of the base of the cone (d)=24 cm

Radius (r)=d/2

=>r=24/2=12 cm

Radius of the base of the cone =12 cm

Total surface area of the cone=πr(r+l) sq. units

=>TSA=(22/7)×12(12+21)

=>TSA=(22×12×33)/7

=>TSA=8712/7 cm²

=TSA=1244.57 sq.cm

Answer:-

Total Surface Area of the cone=1244.57 sq.cm