Question

the volume of a right circular cone is 9856 cm^2 . if the diameter of the base is 28cm, find. (a) height of the cone​

Answer 1

Step-by-step explanation:

Given:

r=

2

28

=14cm

(i)Let height =h

⇒Volume =9856=

3

1

πr

2

h

9856=

3

1

×

7

22

×14×14×h

⇒h=48cm

(ii)⇒Slant height =

r

2

+h

2

=

14

2

+48

2

=

196+2340

=50cm

(iii)⇒Curved Surface Area =πrl=

7

22

×14×50cm

2

=22004cm

2

Answer 2

Answer:

Given:

r=28/2

=14cm

(i)Let height =h

⇒Volume =9856=  1/3πr²h

9856= 1/3 ×22/7  ×14×14×h

⇒h=48cm