Question

the height and base radius of a cone are 16cm And 12cm find the curved surface area of cone

Answer 1

Answer:

1004.8

Step-by-step explanation:

Formula for CSA of a cone = pi*r*l, where

r is base radius

l is slant height.

We have been given values :

r = 16

h = 12

So we need to find the value of l through pythagoras theorem.

By pythagoras theorem,

r^2 + h^2 = l^2

256 + 144 = l^2

400 = l^2

l = + or - 20

l cannot have a negative value, therefore l = 20cm

Now,

CSA of given cone = Pi*r*l

Substituting values in the equation, we get

3.14 * 16 * 20

=1004.8

Therefore CSA of the cone is 1004.8

Mark as brainliest!

Answer 2

Answer:Given, height(h)=16cm and radius(r)=12cm

let the slant height be l

l^2=h^2+r^2

    =16^2+12^2

    =256+144

l^2 =400

    l= 20

curved surface area of a cone=πrl

                                                  =3.14*12*20

                                                  =753.6 cm^2