Answers

2016-02-28T15:41:42+05:30
From the Law of floatation , 
weight of wooden piece = weight of water displaces by waster immersed ...

RD wood     X    V     = RD water  X  5/6 V 
 = 1 X 5/6 
= 5/6 

1 5 1
2016-02-28T16:50:53+05:30
I think Relative density should be the density of substance upon the density of water density of substance =5/6 and divide by one the density of water =0.83
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