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The relative density of a metal may be found by hanging a block of metal from a  spring balance and noting that in air the balance reads (5.00±0.05)N while in water it reads (4.00±0.05)N .  The relative density would be quoted as

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a
5.00±11%
b
5.00±10%
c
5.00±6%
d
5.00±5%

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detailed solution

Correct option is A

d=W1W1−W2=55-4=5 W1−W2=(1.00±0.10)NΔdd×100=0.055.00+0.101.00×100=11%


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