Question

find the total surface area of a cone if its slant height is 21m and diameter of its base is 28m​

Answer 1

Answer:

TSA = 3080

Step-by-step explanation:

given,

slant height 's' is 21 m

diameter of base is 28 m

then radius is 28/2=14 m

Total surface area of cone 2*π*r(s+r)

 = 2*22/7*14*35

 =3080