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  • If pressure at half the depth of a lake is equal to   pressure at the bottom of the lake then what is the depth of lake?

If pressure at half the depth of a lake is equal to \frac{3}{4}  pressure at the bottom of the lake then what is the depth of lake?

Option: 1

10m


Option: 2

20m


Option: 3

5m


Option: 4

15m


Answers (1)

best_answer

Pressure at the bottom of the lake = p_0 +sgh

                        p_0 \rightarrow Atmospheric pressure

Pressure at half the depth of a lake p_0 +sg (\frac{h}{2})

p_0 +sg (\frac{h}{2})=\frac{3}{4}(p_0+sgh)

h=\frac{p_0}{2sg}=\frac{10^5}{2\times 10^3 \times}=5m

Posted by

avinash.dongre

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