Answer:

31.26 m

Step-by-step explanation:

Formula for horizontal range is

R = u² sin 2θ / g

u = initial velocity

θ = angle of trajectory

g = acceleration by gravity

R = u² sin 2θ / g

R = (20)² sin 2(25) / 9.8

R = 400sin(50) / 9.8

R ≈ 31.26 m