It is given that
Radius of the cone = 35cm
Height of the cone = 12cm
We know that
Volume of the cone = 1/3 πr2h
By substituting the values
Volume of the cone = 1/3 × (22/7) × 352 × 12
On further calculation
Volume of the cone = 15400 cm3
We know that
Slant height l = √(r2 + h2)
By substituting the values
l = √ (352 + 122)
On further calculation
l = √ 1369
So we get
l = 37 cm
We know that
Curved surface area of a cone = πrl
By substituting the values
Curved surface area of a cone = (22/7) × 35 × 37
So we get
Curved surface area of a cone = 4070 cm2
We know that
Total surface area of cone = πr (l + r)
By substituting the values
Total surface area of cone = (22/7) × 35 × (37 + 35)
On further calculation
Total surface area of cone = 22 × 5 × 72
So we get
Total surface area of cone = 7920 cm2
