1. The problem statement, all variables and given/known data speed of man=120m/h angle of bird flight with ground=60 degrees. 2. Relevant equations A man on the ground sees a bird flying at angle of 60 degrees with horizontal.He started running at 120m/hour,is able to stay directly below the bird.What's bird speed? 3. The attempt at a solution I've vainly tried to solve it by using vectors.But I'm uncertain how it'd be solved?