Question

a man makes a cuboid of plasticine of sides 5 cm,2 cm,5cm .how many such cuboid will he need to form a smallest cube????

Answer 1

Hey mate..
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First place 5 cuboids of two rows, The resulting figure is also a cuboid with length 10 cm, breadth 10 cm and height 5 cm
Now place 5 cuboids of two rows over the first one.
Therefore the length of resulting figure is 10 cm, breadth is 10 cm and height is 10 cm
Thus the resulting figure is a cube.
So overall we require 20 cuboids of 5cm, 2 cm and 5 cm dimensions to make a cube

Hope it helps !