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Question
Find the radius of the circular base of the cone , if its volume is 154 cm3 and the perpendicular height is 12 cm
Solution
Volume of the cone = 154 cm3
⇒ `1/3 xx (pir^2) xx h = 154`
⇒ `1/3 xx (pir^2) xx 12 = 154`
⇒ `r^2 = (154 xx 3 xx 7)/(12 xx 22)`
⇒ `r^2 = 12.25`
⇒ r = 3.5 cm
Radius of the circular base of the cone is 3.5 cm
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