Marbles displacing water in a cylinder

Marbles displacing water in a cylinder

Secondary 2
4 marks
TGM Original Questions

Core stretch

A cylinder of radius 5 cm contains water to a depth of 8 cm. Twenty-four spherical marbles of diameter 1.5 cm are fully immersed. Using \(\pi=3.142\), find

The cylinder is 12 cm tall. Neglect the tiny areas where the marbles touch the container.

  1. the new water depth,[2]
  2. the total internal surface area of the cylinder in contact with the water.[2]

Solution:

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Answer:(a) \(8.54\) cm (b) \(346.88\text{ cm}^2\).

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