Question

Volume of a cone is 154 cubic cm. it's radius is 7 cm . Find its height....

can anyone help me....​

Answer 1

Step-by-step explanation:

Let the radius of the base of the cone be r cm

Now circumference of base =154cm

2πr=154

r=

2×22

154×7

=

2

49

cm

Slant height =7cm

Curved area of cone =πrl

=

7

22

×

2

49

×7

=539 cm

2

Answer 2

Answer:

3

Step-by-step explanation:

Given : Radius of cone is 7cm.

volume of cone is 154 cubic cm .

height = ?

Formula to find volume of cone is 1/3 × π × r² × h.

1/3 × π × (7)² × h = 154

1/3 × π × 49 × h = 154

π × 49 × h = 154 × 3

22/7 × 49 × h = 154 × 3

22 × 7 × h = 154 × 3

154 × h = 154 × 3

h = 3.

Height of cone is 3 cm.