Q14 of 24 Page 227

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 .

Height = h unit


Radius = r unit


∴ slant height, l = √(h2 + r2)


According to problem,




⇒ r2 + h2 = r2h2/9



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