The range of a projectile when launched at angle `theta` is same as when launched at angle `2theta`. What is the value of `theta` ?

The range of a projectile, when launched at an angle of 15^@ with the horizontalis 1.5 km. What is the range of the projectile, when launched at an angle of 45^@ with the horizontal?

The range of a projectile, when launched at an angle of 15^(@) with the horizontal is 1.5 km. what is the range of the projectile, when launched at an angle of 45^(@) to the horizontal with the same speed ?

The range of a projectile, when launched at an angle of 15^(@) with the horizontal is 1.5 km. what is the range of the projectile, when launched at an angle of 45^(@) to the horizontal with the same speed ?

The range of a projectile launched at angle of 30^@ to the horizontal is 1km . When the angle changed to 45^@ , the range becomes to

The range of a projectile launched at an angle of 15^(@) with horizontal is 1.5km. The range of projectile when launched at an angle of 45^(@) to the horizontal is