The weights of two iron balls are 5 kg and 7 kg. What is the percentage weight of the 1st ball with respect to 2nd ball.
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let 1st=x
'2nd=y
=x+y
=5+7
=12
=5/12×100
=500/12%
=41.6%
=7/12×100%
=700/12%
=58.3%
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