Question 1205354
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 a rectangular tank 50 cm long and 25 cm wide contains 12 litres of water. 
when 4 metal cubes of the same size are placed in the tank, the height 
of the water level becomes 10 cm. what is the length of each edge of the cube?
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<pre>
After submerging the 4 metal cubes in the tank, the volume occupied by the water 
and cubes together is 50*25*10 = 12500 cm^3.


Hence, the volume of the 4 metal cubes is 12500 - 12*1000 = 500 cm^3.


Thus the volume of each of the 4 metal cubes is  500/4 = 125 cm^3.


The size of each cube is  {{{root(3,125)}}} = 5 cm.    <U>ANSWER</U>
</pre>

Solved.


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The major lesson which a student should learn from this post is that this problem is SIMPLE.


The second major lesson which a student should learn is on HOW TO solve this simple problem by a simple way.