A clown is exhibiting a magic trick on the streets wherein he rotates a bucket in a vertical plane without allowing the water in it to spill out. Here, clearly the clown uses centrifugal force to balance the weight of water . This will be possible, when

Options

A. the bucket has r.p.m. `=sqrt(400/(pi^2R))`
B. the bucket has maximum speed= `sqrt(2gR)`
C. the bucket has r.p.m.`=sqrt((900g)/(pi^2R))`
D. the bucket has r.p.m`=sqrt((3600g)/(pi^2R))`

Answer

C