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Question

A boat full of iron nails is floating on water in a lake. When the iron nails are removed, the water level

A
Rises
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B
Falls
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C
Remains the same
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D
Nothing can be said
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Solution

The correct option is B Falls
initially the iron nails are in the boat, so the mass of the boat is more
hence, the water displaced by the boat is more. As a result of it the water level is high
But when the nails are removed , the mass of the boat decreases and hence, the water level will fall down as it will displace less water now.

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