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this was a question in class 10 maths paper for st georges school-alaknanda

Q. A 15 cm long test tube having diameter of 3.6 cm has water

upto a height of 6 cm. 20 spherical drops of oil of radius 9 mm are dropped

into it. What length of test tube

remains empty?.............tell me the solution to this problem or where the solution exists....

1
by hardikpandey

someone with brains can do it....

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