A skier of mass 50 kg stands at point P at the top of the ski jump and moves from P to Q and takes off his jump at Q as shown in figure. If 50% of the change in the gravitational potential energy of the skier between points P and Q becomes the kinetic energy at Q then the speed at which the skier arrives at Q is

• A. \[10\text{ m }{{\text{s}}^{-1}}\]
• B. \[20\text{ m }{{\text{s}}^{-1}}\]
• C. \[30\text{ m }{{\text{s}}^{-1}}\]
• D. \[40\text{ m }{{\text{s}}^{-1}}\]