A piece of material weighing $50 g$ is coated with $6.3 g$ of wax of relative density $0.9$ . If the coated piece weighs $16.3 g$ in water, the density of the material is.

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Solution

=>50+ 6.3 = 56.3 g
=>56.3 g - 16.3 g=40. G
Volume of water displaced is 40 cm.
50/p + 6.3/9=40
50/p=33
p= 50/33
=> p= 1.515

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