Question
A right cylinder vessel is full of water . How many right cones having the same radius and height as those of the right cylinder will be needed to store that water ?
Answer: Option B
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Let radius of each be r and height of each be h.
Then , number of cones needed = (Volume of cylinder)/(Volume of 1 cone)
= `(pi r^2 h)/(1/3 pi r^2 h)` = 3.
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