Answers

2015-07-30T12:23:00+05:30
First find volume of the brick , vol of cuboid = lbh
volume of the brick = 4.5 * 9 * 4 = 162   cm^{3}

now if uh throw the brick into the  bucket , the volume of water raised in the bucket= volume of brick  ----(1)
raised height in bucket  = 10mm = 1 cm
volume of bucket = π r^{2} h ( for h use raised height and find the radius )
volume of bucket = 3.14 * r^{2} * 1

as per (1)
 3.14 * r^{2} * 1 = 162 cm^{3}
  r^{2} = 162 / 3.14 = 51.6
r = √51.6 = 7.18 cm 







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