The maximum horizontal range of a projectile is 400 m . The maximum value of height attained by it will be

The maximum horizontal range of projectile is 980 m. Its initial speed and maximum height is

Assertion: The maximum horizontal range of projectile is proportional to square of velocity. Reason: The maximum horizontal range of projectile is equal to maximum height attained by projectile.

(A): The maximum horizontal range of projectile is proportional to square of velocity. (R): The maximum horizontal range of projectile is equal to maximum height at tained by projectile

(A): The maximum horizontal range of projectile is proportional to square of velocity. (R): The maximum horizontal range of projectile is equal to maximum height at tained by projectile

If the horizontal range of a projectile be a and the maximum height attained by it is b, then prove that the velocity of projection is