Question

1. Find the volume of the right circular cone with
(1) radius 6 cm, height 7 cm
(ii) radius 3.5 cm, height 12 cm​

Answer 1

Step-by-step explanation:

radius =6cm, h=7cm

Volume =

3

1

πr

2

h=

3

1

×

7

22

×6×6×7

=44×6=264cm

3

(ii) r=3.5cm, h=12

Vol =

3

1

πr

2

h=

3

1

×

7

22

×3.5×3.5×12

=154cm

3

Answer 2

Answer:

(i) r=6cm and h=7cm

Volume of right circular cone= 1/3πr²h

= 1/3×22/7×(6)²×7

= 1/3× 22×36

= 264cm²

(ii) volume of cone =1/3πr²h

hence, volume of this cone =1/3×22/7×(7/2)²×12²

= 154cm³