An air bubble rises from the bottom to t...

An air bubble rises from the bottom to the surface of lake and it is found that its diameter is duubled. If the height of water barometer is `11m`, the depth of the lake in maters is

`70m`

`77m`

`7.7m`

`78m`

Text Solution

Verified by Experts

The correct Answer is:

`(H + h)r_(1)^(3) = Hr_(2)^(3)`

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