Physics - Gravitation Question with Solution | TestHub

Variation in $g$ at a height $h$ from the earth surface $g^{\prime }=g\left(1-\frac{2h}{R_e}\right)$ Variation in $g$ at a depth $x$ below the earth surface $g^{\prime \prime }=g\left(1-\frac{x}{R_b}\right)$ But variations are same $\therefore g\left(1-\frac{2h}{R_{\theta }}\right)=g\left(1-\frac{x}{R_{\theta }}\right)$ $\therefore x=2h$