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The relative density of material of a body is found by weighing it first in air and then in water. If the weight in air is (5.00 ± 0.05) newtons and weight in water is 4±0.05 newtons.Then the relative density along with the maximum permissible percentage error is

a
5.0±11%
b
5.0±1%
c
5.0±6%
d
1.25±5%

detailed solution

Correct option is A

Weight in air = (5.00±0.05)NWeight in water = (4.00±0.05)NLoss of weight in water = (1.00±0.1)NNow relative density = weight in airweight loss in wateri.e R.D = 5.00±0.051.00±0.1Now relative density with max permissible error= 5.001.00±(0.055.00+0.11.00)×100 = 5.0 ±(1+10)%= 5.0+ 11%

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