Find the volume and the total surface area of a cone.

Find the volume and the total surface area of a cone having slant height 17 cm and base diameter 30 cm. Take π = 3.14.

Solution:

Slant height of a cone (l) = 17 cm
Diameter of base = 30 cm
Radius (r) = = 15 cm

Find the volume of a cone given that its height is 8 cm and the area of base 156 cm².

Solution:

Height of a cone = 8 cm
Area of base = 156 cm
.’. Volume = × area of base × height

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