What is the depth at which the value of acceleration due to gravity becomes 1/n times the value that at the surface of earth? (Radius of earth = R)

A bus moving at a speed of 24 m/s begins to slow at a rate of 3 m/s each second. How far does it go before stopping?

A bus moving at a speed of 24 m/s begins to slow at a rate of 3 m/s each second. How far does it go before stopping?