Diameter and slant height of a cone are 14 m and 25 m respectively. Fi

1.	Diameter and slant height of a cone are 14 m and 25 m respectively. Find it total surface area.
Answer» Given, the base diameter of cone = 14 m ∴ Radius (r) = \(\frac { 14 }{ 5 }\) = 7 m Slant height (d) = 25 m Total surface area of the cone = πr(l+r) = \(\frac { 22 }{ 7 }\) × 7 × (25 + 7) = \(\frac { 22 }{ 7 }\) × 7 × 32 = 22 × 32 = 704 m² Hence, total surface area of cone 704 m²

Diameter and slant height of a cone are 14 m and 25 m respectively. Find it total surface area.

Answer»

Given, the base diameter of cone = 14 m

∴ Radius (r) = \(\frac { 14 }{ 5 }\) = 7 m

Slant height (d) = 25 m

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

= \(\frac { 22 }{ 7 }\) × 7 × (25 + 7)

= \(\frac { 22 }{ 7 }\) × 7 × 32

= 22 × 32

= 704 m²

Hence, total surface area of cone 704 m²