Question
Three cubes of metal whose edges are 3cm, 4cm and 5cm.
respectively are melted and a single cube is formed. What is the length of the edge of the newly formed cube?Solution
Volume of recast cubes = 33+43+53=27+64+125 = 216 Note- When many cubes are integrated into one cube the side of the new cube will be – a3 = Sum of cubes of sides of all the cube a3 = 216 a=6cm
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