Answers

2014-10-26T08:26:09+05:30
By prime factorisation,
68600=2^3*5^2*7^3
It is not a perfect cube.
We have to multiply it by 5 , then it equals to 343000
It is a perfect cube.
Therefore, we have to multiply 68600 by 5 to make it a perfect cube
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2014-10-29T06:21:04+05:30

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686*100=2*343*4*25=2^3*7^3*5^2\\\\To\ make\ it\ a\ perfect\ cube\\\\mutiply\ with\ 5.\\\\then\ it\ becomes\ (2*7*5)^3.
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