A balloon has a volumn of 10 L at a pres...

A balloon has a volumn of 10 L at a pressure of 1 atm. When the balloon is immersed to the bottom of a lake, its volumn reduces to 1.25 L. Assuming 1 atm. Pressure to be equivalent to 10 m column of water and no change in temperature, what is the depth of lake ?

A

70 m

B

80 m

C

90 m

D

None of these

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A

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