You're trying to throw water balloons into the fifth floor balcony of your neighbor's apartment. The balcony is 20 meters off the ground. You are 1.7 meters tall. If you're standing on the ground below it, throw your water balloon at 20m/s, and the balloon is at its highest point 2 seconds into the throw how high did the water balloon actually go in meters?
Enter only a number, rounded to the nearest whole.