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Spirit in a bowl evaporates at a rate th...

Spirit in a bowl evaporates at a rate that is proportional to the surface area of the liquid. Initially, the height of liquid in the bowl is `H_(0)`. It becomes `(H_(0))/(2)` in time `t_(0)`. How much more time will be needed for the height of liquid to become `(H_(0))/(4)`

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The correct Answer is:
`(t_(0))/(2)`
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