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24. A candle of diameter d is floating on a liquid in a cylindrical container of diameter D (D>>d) as shown in figure. If it is burning at the rate of 2cm/hour then the top of the candle will          

(a)   Remain at the same height

(b)   Fall at the rate of 1 cm/hour

(c)   Fall at the rate of  2 cm/hour

(d)    Go up the rate of 1cm/hour

Answer-b

 

(5)

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