NCERT Example 3.1 - Motion in a Plane
Question: It is raining and a man walks from A to B with a velocity of 3 km h⁻¹ along the straight road AB. The rain is falling vertically with a speed of 35 m s⁻¹. A wind is blowing in the direction from east to west with a speed of 12 m s⁻¹. In what direction should he hold his umbrella?
Answer: Resultant rain speed **R = 37 m s⁻¹**; hold umbrella at **~19° from the vertical toward the east** ( ).
Full step-by-step NCERT solution with diagrams on Something by Zero.