Question
Question: A candle of diameter d is floating in a cylindrical container of diameter D(D \>\> d) as shown in Fi...
A candle of diameter d is floating in a cylindrical container of diameter D(D >> d) as shown in Fig. If it is burning at a rate 2 cm h-1 then the top of the candle will
A
Remain at the same height.
B
Fall at the rate of 1 cm h-1.
C
Fall at the rate of 2cm h-1.
D
Go up at the rate of 1 cm h-1.
Answer
Fall at the rate of 1 cm h-1.
Explanation
Solution
Density of candle is half the density of water. Therefore, it
will always remain half in water. Hence, if it burns 2 cm h-1,
the candle will come up by 1 cm from the water.