The volume of a cone is 396 mm3. If the height of the cone is 10.5 mm, calculate the radius of its base. (π=227)
Given: Volume of cone V=396 mm3
Height of cone h=10.5mm
We know, Volume of cone, V=13πr2h
⇒r2=3Vπh
⇒r=√3Vπh
⇒r=
⎷3×396227(10.5)
⇒r≃6
Therefore, the radius of the cone is 6 mm