Answer:
Step-by-step explanation:
In projectile motion , formula for range is as follows 
R = u² sin 2 α / g , where u is initial velocity of throw , α is angle of throw 
Given R , range = 30 yards , α = 10° 
30 = u² sin 20 / 9.8 
u² x .342 = 294 
u² = 859.65 
u = 29.32 m / s