Initial vertical velocity uh = 22.5*sin(33deg) m/s
At the highest point the vertical velocity is zero, so using v = u + at we have:
0 = 22.5*sin(33deg) - 9.8t. where the acceleration of gravity is 9.81m/s2 downwards. From this you can get the time, t, in seconds.
The horizontal velocity is given by uh = 22.5*cos(33deg) m/s so the distance (in metres) travelled in time t is given by multiplying this velocity by the value found for t.