If the angle of projection is double the angle of inclination ( ) of the plane on which particle is projected, the ratio of times of fligh up the inclined plane and down the inclined plane, will be

• A. <img src="/_files/images/civil-engineering/applied-mechanics/106-5.86-1.png">
• B. <img src="/_files/images/civil-engineering/applied-mechanics/106-5.86-2.png">
• C. <img src="/_files/images/civil-engineering/applied-mechanics/106-5.86-3.png">
• D. 2 cos .