Raindrops are falling with velocity 10√2 m/s making and angle 45∘ with the vertical. The drops appear to be falling vertically to a man running with constant velocity . The velocity of rain drops change such that the rain drops now appear to be falling vertically with √3 times the velcoity it appeared earlier to the same person running with same velocity .
The magnitude of velocity of man w.r.t ground is
A. 10√2m/s
B. 10√3m/s
C. 10 m/s
D. 20 m/s