A) 2P
B) 8P
C) 4P
D) 7P
E) 5P
Correct Answer: D
Solution :
Let depth of lake is\[x\text{ }cm\]. \[\therefore \] \[{{P}_{1}}{{V}_{1}}={{P}_{2}}{{V}_{2}}\] \[(Pdg+xdg)\left( \frac{4}{3}\pi {{r}^{3}} \right)=Pdg\left[ \frac{4}{3}\pi {{(2r)}^{3}} \right]\] \[(P+x){{r}^{3}}=P(8{{r}^{3}})\] \[x=8P-P\] \[\Rightarrow \] \[x=7P\]You need to login to perform this action.
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