Two projectiles A and B are launched with the same initial speed at projection angles of 15° and 30° respectively. Find the ratio of the horizontal range of A to the horizontal range of B.

A projectile is projected with velocity of 40 m/s at an angle θ with the horizontal. If R be the horizontal range covered by the projectile and after t seconds, its inclination with horizontal becomes zero, then the value of cot(θ) is: [Take g = 10 m/s2]