Question

The diameter of a cone is 14 cm and its height is 9 cm, determine its volume.

Answer 1

Answer:

Curved surface area =S=πrl

Curved surface area =S=πrlGiven, r=7,h=9

Curved surface area =S=πrlGiven, r=7,h=9 S=

Curved surface area =S=πrlGiven, r=7,h=9 S= 7

Curved surface area =S=πrlGiven, r=7,h=9 S= 722

Curved surface area =S=πrlGiven, r=7,h=9 S= 722

Curved surface area =S=πrlGiven, r=7,h=9 S= 722 ×7×9=198 cm

Curved surface area =S=πrlGiven, r=7,h=9 S= 722 ×7×9=198 cm 2

Answer 2

Answer:

462

Step-by-step explanation:

diameter of the cone = 14

so, radius= 14÷2=7

Volume of a cone,

V= πr²h/3

=π7²× 9/3

= 22×7×3 (π=22÷7 so, 22/7 × 7×7 = 22×7)

= 462