Two projectiles `A` and `B` are projected with same speed at an angle `30^(@)` and `60^(@)` to the horizontal, then which of the following is not valid where `T` is total time of flight, `H` is max height and `R` is horizontal range.

Two projectiles are projected with the same velocity. If one is projected at an angle of 30^(@) and the other at 60^(@) to the horizontal, then ratio of maximum heights reached, is

Two projectiles A and B are projected with angle of projection B. If R_A and R_B be the horizontal range for the two projectile then.

Four projectiles are projected with the same speed at angles 20^@,35^@,60^@ and 75^@ with the horizontal. The range will be the maximum for the projectile whose angle of projection is

Four projectiles are projected with the same speed at angles 20^@,35^@,60^@ and 75^@ with the horizontal. The range will be the maximum for the projectile whose angle of projection is

Two bodies are projected at angles 30^(@) and 60^(@) to the horizontal from the ground such that the maximum heights reached by them are equal then a) Their times of flight are equal b) Their horizontal ranges are equal c) The ratio of their initial speeds of projection is sqrt3:1 d) Both take same time to reach the maximum height.

Two bodies are projected at angles 30^(@) and 60^(@) to the horizontal from the ground uch that the maximum heights reached by them are equal. Then (a) Their times of flight are equal (b) Their horizontal ranges are equal (c) The ratio of their initial speeds of projection is sqrt(3) :1 (d) Both take same time to reach the maximum height. Mark the answer is