Question

(iv) The numerical values of the volume and the lateral surface area of a right circular cone
are equal. If the height and the radius of the cone are H unit and r unit respectively,

then let us write the value of 1/h^2 ➕1/r^2
​

Answer 1

Answer:

1/3πr^2h=πrl

1/3r^2h=rl

1/3rh=l

now

1/h^2+1/r^2=

r^2+h^2/r^2h^2

l^2/r^2h^2

(1/3rh)^2/r^2h^2

1/9r^2h^2/r^2h^2

1/9