A body weighs 40 g in air. If its volume is 10 cc in water it will weigh:

30 g

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40 g

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50 g

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none of the above

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Solution

The correct option is A 30 g
Weight of the body in air $= 40 g$
Volume of water displaced if the body is fully sipped in water $10 c m^{3}$
So, upward thrust executed by water $= 10 g$
So, weight of body in water $= (40 - 10) g r a m s$ $= 30 g r a m s$

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