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Q.

A block of solid insoluble in water weighs 24gm in air and 21gm when completely immersed in water. Its weight when completely immersed in liquid of specific gravity 1.1 is                            

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a

24gm

b

27.3gm

c

3.3gm

d

20.7gm

answer is A.

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Detailed Solution

Weight of solid in air w1 = 24g

Weight of solid in water w2 = 21g

The specific gravity of liquid = 1.1

Weight of solid in liquid w3 =?

Specific gravity ρLρW=w1-w3w1-w2 

1.11=24w32421

1110=24w33

24w3=3.3

w3=243.3=20.7gm

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A block of solid insoluble in water weighs 24gm in air and 21gm when completely immersed in water. Its weight when completely immersed in liquid of specific gravity 1.1 is