Answer :

Volume of hemisphere of radius 9 cm


= × π × 9 × 9 × 9cm3


Volume of circular cone (height = 72 cm)


× π × r2 × 72cm


Volume of cone = volume of hemisphere


× π × r2 × 72 = π × 9 × 9 × 9


r2 = π × 9 × 9 × 9 × π = 20.25


r = = 4.5cm


Hence, radius of the base of the cone = 4.5 cm


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses