Hi,
The question is you want is a part of physics class 11th, fluid mechanics.
The answer for your question is:
Here, height= 9 cm, r1=0.02 cm, r2= 0.03cm
Now, using the formula,
we get, r1h1=r2h2
after solving this the value for h2 will be 6 cm
I hope this helped you.
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