Question

rain is falling vertically with a speed of 4 m per second after sometime when start flowing with a speed of 3 metre per second in north to south direction. The magnitude of velocity of rain with respext to wind is - (a) 5m/s. (b) 3m/s (c) 4m/s. (d) 15/4 m/s

Answer 1

the magnitude of velocity of rain will be X*X=3*3+4*4
X=5m/s so A option is the answer