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Water and Ice

Math brain teasers require computations to solve.


Puzzle ID:#41688
Fun:*** (2.1)
Difficulty:*** (2.23)
Submitted By:shenqiangAcn****!!
Corrected By:stil




When water changes into ice, the volume increases by one ninth. Consider a 20 cm-tall cylindrical beaker, full of ice. On top of the beaker, there is a cone of ice of the same diameter and 5 cm-tall. When all the ice melts into water, what is the height of the water in the beaker?

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