An object is projected with a velocity of \[20\text{ }m/s\] making an angle of \[45{}^\circ \] with horizontal. The equation for the trajectory is \[h=Ax-B{{x}^{2}}\] where h is height, x is horizontal distance, A and B are constants. The ratio A: B is \[\left( \text{g = 10 m}{{\text{s}}^{-2}} \right)\]

• A. \[1\text{ }:\text{ }5\]     
• B.        \[5\text{ }:\text{ }1~~\]
• C. \[1\text{ }:\text{ }40\]   
• D.        \[40\text{ }:\text{ }1\]