3 small cubes have the sides 3cm, 4cm, 5cm respectively. These are melted to form a large cube. Find the ratio of total surface area of the smaller cubes to that of the larger cube.
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Answer Posted / saurabh tyagi
volume of new cube = (3*3*3)+(4*4*4)+(5*5*5)
= 9+64+125
= 216cm3
i.e (edge)^3 = 216cm3
so, single cube= 6cm
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