Question

The radius of the base of cone is 7 cm and its
vertical height is 15 cm. Find its volume and curved
surface area.​

Answer 1

Answer:

given R =7cm and L (vertical height) =15cm

Step-by-step explanation:

• Curved surface area = πrl
• Volume = 1/3 πr^2h

So C.S.A =πrl

c.s.a= 22/7 x 7 x 15

c.s.a.=22x15

c.s.a=330

To find volume we want to find h

l^2 = r^2+h^2

(15)^2 =(7)^2 +h^2

225 = 49 + h^2

h^2 =176

h =√176

h =4√11

now volume

v =1/3 πr^2h

v =1/3 x 22/7 x 49 x 4√11

v =(22 x 7 x 4√11) / 3

v =616√11 / 3