18. Find the number of plates, 1.5 cm indiameter and 0.2 cm thick, tha – InterviewSolution

1.	18. Find the number of plates, 1.5 cm indiameter and 0.2 cm thick, that can befitted completely inside a right circularcylinder of height 10 cm and diameter[CBSE 2014]
Answer» Vol. of cylinder = πr^2h= 22/7(4.5/2)^210= 22/75.062510= 159.107143 cm^3vol.of plate = πr^2h= 22/7(1.5/2)^20.2= 22/70.56250.2=0.35357143 cm^3No.of plates = vol.of cylinder/vol.of plates= 159.107143/0.35357143= 450 plates.

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