Explain rain man problem completely with diagrams

Explain rain man problem completely with diagrams

Sample Question of Rain-Man problems in Physics
Question : A person standing on a road has to hold his umbrella at 60* with the vertical to keep the rain away. he throws the umbrella and starts running at a speed of 20m/s. He finds that the rain drops are hitting his head vertically. Find the speed of rain drops with respect to
(i) A
(ii) the road B
(iii) the moving person

Solution: