A) 12 cm
B) 15 cm
C) 10.5 cm
D) 7 cm
Correct Answer: A
Solution :
Let the water should be filled up to height \[x,\] so that bottom of the container should appear to be raised up to height \[(21-x).\] Apparent depth (from figure) \[h=(21-x)\]Real depth, \[h=x\] \[\therefore \] \[\mu =\frac{h}{h}\] \[\frac{4}{3}=\frac{x}{21-x}\] \[x=12\,cm\] Apparent depth (from figure) \[h=(21-x)\]Real depth, \[h=x\] \[\therefore \] \[\mu =\frac{h}{h}\] \[\frac{4}{3}=\frac{x}{21-x}\] \[x=12\,cm\]You need to login to perform this action.
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