Question

The pressure at the bottom of a lake, due to water is $4.9\times {10}^{6}N/m^2$. What is the depth of the lake?

• A. 500m
• B. 400m
• C. 300m
• D. 200m

Answer 1

The correct option is A 500m

Given,

$P=4\times {10}^{6}N/m^2$

$\rho =1000kg/m^2$

We have,

$P=\rho gh$

Then,

$h=\frac{P}{\rho g}$

$=\frac{4\times 1066}{1000\times 9.8}=\frac{1000}{2}=500m$