Question

    type-ssc

    Three cubes of metal whose edge are 6cm, 8cm and 10cm.

    respectively are melted and a single cube is formed. What is the length of the edge of the newly formed cube?
    A 18cm Correct Answer Incorrect Answer
    B 16cm Correct Answer Incorrect Answer
    C 28cm Correct Answer Incorrect Answer
    D 12cm Correct Answer Incorrect Answer

    Solution

    Volume of recast cubes = 63+83+103=216+512+1000 = 1728 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 = 1728 a=12cm

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