Q. 30

# Marbles of diamet

Given,

Diameter of marble = 1.4 cm

Diameter of cylinder = 7 cm

Radius of cylinder = 3.5 cm

Cylinder height = 5.6 cm

Radius of marble = 0.7 cm

Volume of 1 marble = πr3

= = 1.4373

So,

Let the number of marbles be n,

Increase in the Volume of cylinder due to n marbles = πr2h

= 3.14 × 3.5 × 3.5 × 5.6 = 215.6 cm3

Hence the total numbers of marble required = = 150 marbles

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