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Q.

If a marble of radius 2.1 cm is put into a cylindrical cup full of water of radius 5 cm and height 6 cm, then how much water flows out of the cylindrical cup.


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a

38.8cm3

b

55.4cm3

c

19.4cm3

d

471.4cm3 

answer is A.

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Detailed Solution

The marble's radius, r = 2.1cm
Question ImageNow,
The volume of water that flows out of the cylindrical cup  = Volume of the marble
                                                                                             = 43πr3
                                                                                             = 43.227. (2.1)3
                                                                                             = 38.808 cm3
 
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