71. In a conical cup 4000 (four thousand)
drops of water are dropped into it. The
diameter of each drop is 4 mm. If the
diameter of the end of the cup is same as
the height of the cup, what will be the
height of water in the cup?
(a) 6 cm
(b) 8 cm
(c) 4 cm
(d) 7 cm.
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Answer:
d is a correct answer 8 cm is correct answer
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