Question

• The numerical values of the volume and the
area of the lateral surface of a right circular
cone are equal. If the height of the cone be h and radius be r, the value of 1/h² + 1/r² will be ​

Answer 1

Answer:

Step-by-step explanation:

As per question

  Volume of cone = LSA of cone

                    πr²h = πrl

we know that l = √h²+r²

Then,(π get cancelled)

                      r²h = r√h²+r²

                    r²h/r = √h²+r²            (squaring on both sides)

                    (rh)² = h²+r²

            h²+r²/r²h² = 1

            1/h²+1/r²  = 1

i hope it helps